I've got severe depression and I drink every night and experiment with drugs?

like right now, i've been drinking scotch. I'm depressed because I'm lonely and I can't find anyone to talk, much less find a special girl. it sucks because i'm turning into an alcoholic. Girlfriend of 1.5 years left me and that was almost 2 years ago. Since then I've become severely depressed, i've tried marijuana, ecstasy, cocaine, painkillers, speed, and tons more, plus i drink hard liquor every night, including right now. I need a girlfriend in my life but I haven't been able to find one and soon i fear it'll become too much to deal with that i'll end up taking my own life trying to make it stop. this is probably the alcohol talking but the truth comes out when your drunk and idk what to do anymore