Hi, I'm not in the same situation as you, mine is much different...
But, from what you're describing it does sound like he may be considering things. My suggestion to you is play things very "cool." Try to be a good friend when you can (I think it's best if husbands and wives can be "best friends"), and since there's OW you'll probably have to let him come back on his own. Try not to scare him off, but be a very attractive, confident, happy, interesting woman. Someone any man would love to have in his life. Good luck to you!
There is no arriving, ever. It is all a continual becoming.