I need help. I feel pressured by my surroundings to be a certain way that i'm not?

i'm struggling with my identity right now and i just feel really really hurt by so man things in my life I feel like I want to escape and run away and adopt a new identity it is that painful. I feel trapped.I don't know how my life will continue to go if I continue down this path with these people that I feel completly smothered by right now. I just can't handle people, and at this point there's so many people together in groups all at once it's hard to tell the good people from the bad. On top of it, it's so unstable because i don't know if i'll see these people forever in the future and I feel like going away to school wasn't a good idea, yet at the same time was. I'm so hurt and in pain and I feel like I can't tell anyone, and things just continue on. I feel like I can't let my guard down for a minute and I feel hurt that I've restricted myself from being me and put on an act for so long that i don't even know who I am anymore. I want to delete the last year and a half from my life. I wish it never happened and I never met any of these people and that my life was peaceful and simple beautiful life i've always wanted. I feel like after all this hurt I received and even mistakenly innocently caused upon myself have all come crashing down on me, but it's been like this for a few weeks.what should I do?