I recommend not drinking now that you know youll be choosing to become a shitty person if you do.

You didnt have more friends because you were an asshole as a kid. Your friends then were either fellow assholes or hadnt yet learned what kinds of treatment they deserve from their peers.

And, being nice doesnt obligate people to be your friend either.

Adults have limited time and energy. There isnt enough of the precious stuff to give to everyone. So they select some people who are the kind they want to be friends with, and gift them that rare stuff.

If you are shitty to your friends, you lose them. Be better next time.