I tend to use humor a lot to deflect painful situations, memories, etc. I figure you can laugh or cry, so I try to choose laughter when I can.
I used to socialize fairly regularly with ow. She was ex's coworker. When we went to work functions we would all sit at the same table (ow and her H, me and my exH); then after we would go out to the bar with a group from work. She bought me shots a few different times and even invited me to go on a "girls' night" with her and her friends. Then-H got all in a tizzy about that, said he didn't want me getting drunk and saying something embarrassing about him. Now, I am guessing he didn't want her to say something incriminating!
Early on that was one of the most upsetting things, to me. Not just that he cheated on me. But that every time she sat by me, talked to me, bought me a drink, I KNOW she was laughing at me on the inside bc she knew she was sleeping with my H. And the fact that it didn't upset him to see her taunting me, basically, well for some reason that hurt as much as the cheating.
Oh well, the past is the past. As Garth says in Wayne's World, "Live in the Now!!!"