UGH Ganb8te! What odds of running into him and yep there he is! How irritating! I live in fear of this and I've seen OW1 twice now and my heart stops and I want to vomit. I can only image if I saw him or if I saw him and OW. Ugh.
Sorry you had to experience that and get a bad feeling from it. Wish I could have shared a G&T with you and commisserated.
I wonder if he did see you also. Don't you think it is so weird, sad and funny if he did see you and chose not to acknowledge it? On the other hand if he was meeting someone then that would be a "reason" to just let it go and not deal with any awkwardness.
I guess one lesson I can learn from this is that I definitely won't be going to that party with my WAH and OWs!
I hope you are feeling better and it sounds like you are still digging deep so that is excellent!