Somewhat more emotionally available? Sounds like a lukewarm endorsement. The way you described him in recent posts it sounded like he was out a lot, not just on required business, but with his buddies, etc. By contrast, I like being at home and having family around and going on date nights at least once a week, sometimes twice a week, in spite of the state of our marriage.
You're doing an admirable job standing by your man. You're doing more and better than most women would. That's a compliment. I just wonder if your husband deserves it. He doesn't know how lucky he is. In fact, before too long, he may find out that a lot of other women out there aren't going to stand by him anywhere near as much as you. In fact, at the moment he apparently hasn't yet been dumped by anybody, so he might be operating at a false and shaky level of confidence. So he might get dumped by someone else and come back you, realizing that you would never do such a thing.
I'm not a believer in cutting anybody off. Rather, I'm more of a "can't we all get along" type of person. I think you should invite him as much as possible, even if you start seeing someone else. Well, that's my style anyway.
Spend time with friends, and slowly cultivate new ones. Have some male friends too, but mature ones who you can talk to to get the male point of view and who understand your situation, respect your boundaries and don't try to have a hidden agenda. Some women don't believe such men exist, but they do. Avoid hanging out only with women who have been abandoned by their husbands.
Take it just one day at a time. MLC's happen because someone tries looking too far into the future.