Wow, craven! I bet it felt like such a release to write that.
Would it surprise you to hear that your story is just like many of the others on here? Meet a guy who is in the midst of leaving another relationship, fall quick and hard and everything's perfect, then the truth starts to out. You're not alone on that one.
You're smart - you'll figure this one out. All I'll say is that you can leave a relationship for any reason. I have a friend who couldn't stand the way her bf of 6 months ate. Loved everything else, but couldn't stand his table manners. Bet he's still bitching about her now, but she doesn't care because she couldn't live her life with him across the table every mealtime. If the other person doesn't want it to end, no reason is good enough. So tell the whole truth, say it's the way he leaves the towels on the floor (or whatever), or just tell him it's not working out. if he gets into recovery, he'll understand one day. If he doesn't, then that's his lookout.
Glad you found us.