I’m very proud of you for going! Your son must have been so happy. And it sounds like you went in there, held your head high and enjoyed yourself.
As far as your ex. I think me and my ex are the most detached ever and truly have no feelings for each other. 9 years together, 4 married. Of course I’m in communication and seeing each other often because we share a young child. He has been married to his OW for 7 years now. I have a wonderful boyfriend. We still have fleeting moments rarely of connection. Does it mean either of us has a strong hold on each other? Nope. It’s just human nature when you share so much with one person.
Stop being so hard on yourself. You are human and aren’t going to be dead inside towards someone you shared your life with. That’s an actual impossible expectation.
Tell me, do you think you would have been happier if you missed the event?
And FTR, I think OM was intimidated by seeing YOU. That’s usually how it goes.
Stop being so hard on yourself for having feelings. They are completely normal!