Thanks Rain for the advice. I have decided not to invite him round. If I get another message, I will reply saying that he can come if he wants. If I don't get another message, I won't bother with it.
I'm feeling in a better place now and don't really want to jeopardise this. STBXH has checked out a long time ago ( for me it was when he started A), and it's a long time to fall back in love with me. So I'm moving on with my life, become the better I can be and see what comes my way.