The smoking weed could be making the social anxiety worse.

There must be good books to read that teach the social skills you haven’t learned. Making friends is the same process to finding a romantic partner, basically.

Being introverted and very shy is so understood and accepted and there are many others like you to find and bond with. Or finding someone extroverted who is different from you sometimes makes a great match.

As for “dying alone” fear... I don’t get it. Don’t we all die alone anyway? When we are dying and so out of it, do we really care who is there with us? IDK, I’ve seen people so close to me die and they really weren’t even there in the room any more... just saying...