I've seen this situation played out by a few friends. It never leads to a good place. Enjoy your crush, but realize that there is a line that should not be crossed.
Besides, a large amount of your attraction is probably based on the fact that he is new, unlike your spouse. It is hard to compete with something shiny and new. When his newness wears off and he starts acting like a regular guy, your attraction will no doubt diminish.
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?