I think I'm going crazy

I'm getting more and more unstable each day. Ever since I moved for college, I lost all my friends and never made any new ones. I'm finding it harder and harder to relate with people, I can't even hold a conversation now. I talk to myself a lot more, debating what the hell am I doing. I don't feel very alive, I feel like I'm a floating spirit going around. I catch myself staring at people inappropriately because I don't really feel in touch with myself and don't really care anymore. All I have is disdain for people, I have these paranoid thoughts that they hate me and are plotting something to hurt me. I got invited for a rally and the first thought that went to my mind "you just want me to go there so you'll have more people, you little shit" I don't remember anything from my classes I just sit there and everything just turns into incomprehensible mumbles. Occasionally, I hear something that snaps me out of it but it's very rare. Everything feels so dead and boring, I've tried to go to all activities that I can but they end up being disappointing and feeling routine.

All I do is masturbate everyday, because it at least makes me feel pleasure.

I also have this overbearing feeling that I'm running out of time and that I'm going to die soon

tl;dr I'm becoming a crazy hobo, help.