Sad and depressed

So I have no friends to talk to, I find it so hard to trust. I had a terrible past (relationship wise) , college and it scarred me. I'm scared I take pills and alcohol. Then I opened up , seeing a therapist, she put me on citalopram. I still overdose on it. It's wrong but I can't help myself. I want to be loved. I only meet people that want just sex. I don't know how to party. I don't know how to talk to people. I just stay locked up in my room. I'm crying as I'm typing. I hope I don't reach my breaking point and just......