First LOVE

Anyone can fall into CRUSH at anytime with another anyone but falling into love is a very different part of the story and this is the point in which the heart go into some ups and downs; your feelings may go beyond your imaginations and you may do things that you are never to do if you weren't in that situation and this situation is LOVE.
Yeh!! Love Drives human crazy. I didn't meant only humans but also animals. If you are having your first love you may not reveal your love to your beloved and much don't succeed in getting their first love due to this kind of fear. They never share their feeling and obviously had to chew this feeling with lots of pain.
If you have just got into your first love, first of all try to make him/her clear about your feeling even if they take it positively or not. Doing this you will never regret in your life telling yourself that if I had done this or if I had proposed her or bla! bla!! bla!!!
Its painful but its a phenomena you got to live with. If you succeed in getting your first love I must say You will be successful in your dreams.

Frustration

Frustration is a common emotional response to opposition. Related to anger and disappointment, it arises from the perceived resistance to the fulfillment of individual will. The greater the obstruction, and the greater the will, the more the frustration is likely to be. Causes of frustration may be internal or external. In people, internal frustration may arise from challenges in fulfilling personal goals and desires, instinctual drives and needs, or dealing with perceived deficiencies, such as a lack of confidence or fear of social situations. Conflict can also be an internal source of frustration; when one has competing goals that interfere with one another, it can create cognitive dissonance. External causes of frustration involve conditions outside an individual, such as a blocked road or a difficult task. While coping with frustration, some individuals may engage in passive–aggressive behavior, making it difficult to identify the original cause(s) of their frustration, as the responses are indirect. A more direct, and common response, is a propensity towards aggression.

Maybe even add in some anger because you’ve been working really hard towards your goal or on a project and it just isn’t working. Or you feel like you’re stuck in a dead-end job and can’t find another one. And you may not even really know why. All you know is that you seem to be stuck and no matter how hard you try, you don’t seem to get anywhere. You’re just spinning your wheels in the mud and all you feel is pure frustration. Sound familiar?

loneliness

To feel lonely is to be overwhelmed by an unbearable feeling of separateness, at a very deep level. To some degree, it is a totally normal emotion, a part of growing up. At birth, we all start the process of separation, the growth towards becoming individuals. Also, from our earliest months, as awareness of our separateness dawns upon us, the parallel need to seek relationship begins.

It's a balancing act, a see-sawing between the search for intimacy and an acceptance of isolation that continues throughout life. However smoothly this passage from birth to mature adulthood goes, there are bound to be times in our lives when this process of growing up, of becoming separate selves, feels difficult; times when we feel anxious, abandoned, unloved, insecure. In other words, when we feel lonely.

Shyness

Shyness is an emotion that affects how a person feels and behaves around others. Shyness can mean feeling uncomfortable, self-conscious, nervous, bashful, timid, or insecure. People who feel shy sometimes notice physical sensations like blushing or feeling speechless, shaky, or breathless.

Shyness is the opposite of being at ease with yourself around others. When people feel shy, they might hesitate to say or do something because they're feeling unsure of themselves and they're not ready to be noticed.

New and unfamiliar situations can bring out shy feelings — like the first day of school, meeting someone new, or speaking in front of a group for the first time. People are more likely to feel shy when they're not sure how to act, what will happen, how others will react, or when all eyes are on them. People are less likely to feel shy in situations where they know what to expect, feel sure of what to do or say, or are among familiar people.

Like other emotions, shy feelings can be mild, medium, or intense — depending on the situation and the person. Someone who usually or often feels shy might think of himself or herself as a shy person. People who are shy may need more time to get used to change. They might prefer to stick with what's familiar.

Fear

Fear  is a distressing negative sensation induced by a perceived threat. It is a basic survival mechanism occurring in response to a specific stimulus, such as pain or the threat of danger. This set also includes such emotions as joy, sadness, and anger. Fear should be distinguished from the related emotional state of anxiety, which typically occurs without any external threat. Additionally, fear is related to the specific behaviors of escape and avoidance, whereas anxiety is the result of threats which are perceived to be uncontrollable or unavoidable. Worth noting is that fear almost always relates to future events, such as worsening of a situation, or continuation of a situation that is unacceptable. Fear could also be an instant reaction to something presently happening.

Fear is a vital response to physical and emotional danger—if we couldn't feel it, we couldn't protect ourselves from legitimate threats. But often we fear situations that are in no way life-or-death, and thus hang back for no good reason. Traumas or bad experiences can trigger a fear response within us that is hard to quell. Yet exposing ourselves to our personal demons is the best way to move past them.

Euphoria

 Euphoria: Elevated mood. Euphoria is a desirable and natural occurrence when it results from happy or exciting events. An excessive degree of euphoria that is not linked to events is characteristic of hypomania or mania, abnormal mood states associated with bipolar disorders.

Euphoria is medically recognized as a mental and emotional state defined as a profound sense of well-being. Technically, euphoria is an affect, but the term is often colloquially used to define emotion as an intense state of transcendent happiness combined with an overwhelming sense of contentment. The word derives from Greek, "power of enduring easily, fertility".

Euphoria is generally considered to be an exaggerated physical and psychological state, sometimes induced by the use of psychoactive drugs and not typically achieved during the normal course of human experience. However, some natural behaviors, such as activities resulting in orgasm or the triumph of an athlete, can induce brief states of euphoria. Euphoria has also been cited during certain religious or spiritual rituals and meditation. Euphoria can also be the result of a psychological disorder. Such disorders "include bipolar disorder, cyclothymiacs personality, head injury, and hyperthyroidism".

Anxiety

Anxiety is a feeling of nervousness, apprehension, fear, or worry. Some fears and worries are justified, such as worry about a loved one or in anticipation of taking a quiz, test, or other examination. Problem anxiety interferes with the sufferer's ability to sleep or otherwise function. It is noteworthy that teenagers are particularly susceptible to having irritability as a symptom of a number of emotional problems, including anxiety. Anxiety may occur without a cause, or it may occur based on a real situation but may be out of proportion to what would normally be expected. Severe anxiety can have a serious impact on daily life.

Anxiety is a generalized mood condition that can often occur without an identifiable triggering stimulus. As such, it is distinguished from fear, which is an emotional response to a perceived threat. Additionally, fear is related to the specific behaviors of escape and avoidance, whereas anxiety is related to situations perceived as uncontrollable or unavoidable. Another view defines anxiety as "a future-oriented mood state in which one is ready or prepared to attempt to cope with upcoming negative events", suggesting that it is a distinction between future vs. present dangers which divides anxiety and fear.