Regarding replying to his texts, I think that is appropriate. It is best to let him initiate contact, unless it has to do with kids or practical matters.
Your 180 is going to be to stop pursuing or putting pressure on him in any way to come back at this point.
Why not plan a eve. out with some friends, and have H come and babysit ? Be vague about what you are doing, but dress nicely and put on a little perfume. Go to the atm and witdraw cash, so he can see the W/d on your online acct. if you have one, but don't feel you have to spend it.
Create some intrigue and mystery about you.
I went shopping the other night and got some new clothes instead of going to dinner w/wifes family. I am going to do the same thing.
Me 47, W 32,D 6, Met 11 yrs. ago, M 7 Bomb 4/08/08, Sep. 8/10/08, Div. 8/10/09