1.

Social anxiety:

n.

Social anxiety is a discomfort or a fear when a person is in a social interaction that involves a concern of being judged or evaluated by others.

panic attack:

n.

The sudden onset of intense anxiety, characterized by feelings of intense fear and apprehension and accompanied by palpitations, shortness of breath, sweating, and trembling. Also called anxiety attack.
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Luke has had social anxiety and panic attacks ever since he was little. The only thing keeping him sane is Calum, his bestfriend, also his crush.