I Don't Know What To Do. I Think I'm Depressed.?

Wow, you sound exactly like me. I'm 18, and the last 2 years have been really tough. I hated my school, hated my frends, hated everyone i was surrounded by, I just felt claustrophobic, I needed to get away, but i culdnt. So i just stopped going out. There was no point. I would just sit at home, sometimes just staring out the window the whole night. I cry everyday, for many reasons. I'm very sick, I know it. I also have started self-harming. I also have suicidal thoughts nearly every day. So I would be more than happy to talk, you can add me on messenger and we can just chat bout life and our problems and stuff. Because I dont have anyone either, and I really need someone to talk to, and I would also like to be there for you too. Or you can just email me, or if you dont feel like talking, just remeber that I care about you, and other peopel reading your qs care about you too. Good luck:)