How do you finally lose the feelings?

Throwaway, because I don't want this tied to my main account.

I'm past the end of my rope, I think. I'm hanging on to the threads at the end. His sex drive is at nil...he agrees we need to do more, but there's never any following action. I suggested a date night earlier this week. (We haven't really had one since our 2yo was born.) His first response? "The baby needs us right now." He doesn't even call me by my name anymore...it's always "Mommy," which I don't mind as much when the kiddo is there, but wtf calling me that after he goes to bed!

He also talks shit about other women's looks (albeit not mine). She looks old, she has a crooked nose, she has cellulite. This combined with the fact that we have sex once per fiscal quarter (usually initiated by me) makes me feel like I must be completely disgusting despite knowing logically that I'm not that bad.

The shitty thing is we've discussed this. We've also discussed his drinking problem. Same excuse each time: "I'm so tired! I'm so stressed!" Never wants to get a new job or go to AA, though. I'm also beyond stressed at work and I don't need this BS at home.

I don't know how I would make it as a single mom. I'm scared of having to move to a crap area or having to send my son to a crap daycare. Or moving in with my folks...yikes.

I think I could take this all better if I could just get to a point where I give no more fucks about him. How does one do that, though? How I do I get through the next few years until my son goes to public kindergarten and I can finally get out of this purgatory?

Any advice welcome, and thanks for listening to my disjointed vent.