Maggie, I'm also in a similar situation. My H turns 33 in two weeks and is currently dating a girl in her early 20s. At least your H told you he's ready to date, mine has been saying recently that he wasn't, but didn't keep this hidden very well. I also think it's a midlife crisis. His son's stepfather joined the military three months before we separated and we knew we had a good chance of not being able to see him as much. And his father moved out when he was 9 or 10 and started a life with another woman and he's never been able to forgive him.
I'm trying to take it day by day, but it's very hard. I'm trying to do things for myself-take classes, spend time with friends who understand what I'm going through, and keep busy. We also have a house we're trying to sell, so sometimes I have to contact him about that, but I'm really trying not to contact about anything else. He's been my best friend for years, so I understand wanting to send a quick text to tell him about something, but right now that's not what he needs. I also nagged about housework and other things, so I've made a decision to be only positive in all of my interactions from now on. He's been out of town all week and haven't communicated since Monday, but I'm going to try my best to keep out all negativity. I know it's really hard, but from what I've been reading, that's exactly what we have to do.
M36 XH34 M-5 T7 4/11 H confused 5/11 ILYB 6/11 OW discovered 7/11 I move out, OW over 5/12-OW2,done->new EA, but H wont file 9/12 H "best bf ever" to EA/OW3 3/13 H/OW break up H files 4/13 D 6/18/13