Cat,
H never actually left. It has been two weeks since I confronted him about still being in contact with OW. He said he would not talk to her anymore and has been coming straight home from work (as far as I know). I am still a little insecure about the whole sitch as H and OW work together and do not work normal 9-5 hours. He could be leaving here an hour early just to meet up with her for all I know.

Does the return of his affection take time? Am I being unreasonable and impatient or should I talk to him about it? Or would talking to him about it make him uncomfortable and send him running?

I guess I just don't want our M to go back to the way it was, where everything in life takes priority over our R as a couple. I understand that after being together for 13 years the spark sort of dies out but I want to rekindle that spark and turn it into a raging fire where we can't get enough of eachother.