Hey Merrick, I've been following your sitch for a little while now. I know exactly where you are coming from - needing some emotional deposits.
I think you have to make a decision, give your M everything you've got, or just go through the motions. If you are just going through the motions, go on the date. If you are serious, be aware of how your actions support, or destroy, what you want your R and M to become.
I know it is tough, having W getting with OM what you are missing. I used to dream about running into a girlfriend from college. I've put that dream behind me. If my M doesn't work out, I'll have plenty of time to pursue it then. When M does work out, I don't want to have anything to regret.
You do have to do things for you, and be mysterious, but keep your M goals in mind.
This is a time for me. Time for me to be the best H, father and person I can be. This is not the time to do what W is doing.