Accepted isolation, now what?

19yo. I'll try to make this as to the point as possible. I have no friends or family, the people that I used to talk to only tolerated me for drugs. I quit about six months ago. I literally know no one and can't talk or comunicate with other people (anxiety for people I don't know, I'd rather just avoid contact) I don't want to go back to drinkin and all that cause it's just killing me faster but I don't know what else to do. And if your gonna say school or job #1 I've got plenty of money #2 I couldn't handel being in situations like that. what should I do? I'm running out of options. I won't live more than 2 years (feels like forever) if I don't stay clean but if I do I won't make it that long. What do I do?