I don't care about anything anymore?

I used to be such a different person than I am now. I wanted to help the world at some point in my life. When I was 18 I met this guy who ruined me and made me incredibly self conscious. I spent 3 years being depressed over him and in those same 3 years deciding that i didn't want to care about things anymore... about people about anything because that way I wouldn't get hurt.

Well it worked and now i just don't know who I am anymore... I almost feel like i have to fake my emotions because i honestly can't feel anymore... I am a bitch and I just used to be someone else :( does anyone have an advice?
I don't care about anything anymore?
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