Maybe he went to see mom because she helps with his sobriety? Just guessing.
I also want to be with my AH all the time, which he sees as smothering and just pushes away. When I get myself involved with other things and act like it's no big deal and I dont miss him (we're separated), then he calls and comes around more.
Try to make yourself happy nomatter what he's doing. Be thankful he's still sober. Some of us are still praying for that day to come.
All my best to you,
Lex