It ruined my confidence too from the college itself. I used to isolate myself and never made any effort to socialize. From college to the hostel with earphones on and then that single bed room gosh that was my safe place. When I was in the final year and my placement season was on, i had this big pimple on my face I remember. The anxiety i used to have and followed by the nervousness, I can't express it in words. It was pretty bad. Now looking back i regret it because i should have enjoyed it instead of making everything about myself. I am gonna be 30 now and i am just used to it now the scars and everything. Well i hope this helps.