You can try al-anon online and you might try a few different meetings to see if you could find one with a younger group, you should be able to find a list of all the meeting locations on the al-anon website.
My biggest concern with your boyfriend is the drunk driving, if he wants to sit at home and drink that is one thing, but he could maim or kill an innocent person, what are you going to do when he ends up in jail, are you going to post his bail and pay his lawyers fees?
As we have said before you did not cause it, you cannot fix it, it's not your problem.