You cannot properly take care of your own problems while worrying about him and his problems. You can't fix his alcoholism and he isn't relationship material at this point. It honestly sounds like he's not as interested in a relationship as you are, so you might as well let him go. You have more serious issues that you need to be concentrating on. We can't force someone to love us, and truth be told, you have no business being in a relationship either. You have a plethora of issues that you need to address.
Step back and tackle your own problems. Leave him alone to either deal with his own issues or not. Your plate is full enough.