My [23F] boyfriend [25M] of 18 months asked my permission to hang out with his ex-fiancé who will be in town.

My boyfriend has a trip planned to Philadelphia to see his childhood friend who just had a baby. The trip is for the weekend and they have plans to go out to a sport event. The sport event is also being attended by his ex-fiancé. <br><br>This would be the first time in 8 years that my boyfriend has seen her. He was very transparent the whole time. He told me that he would give me an ultimatum if I were in his shoes. <br><br>He is not in love with her anymore. We have no concerns about disloyalty and he said they would not be alone at any point and that it would be purely as friends to catch up. <br><br>Thesporting event will also be attended by other people he is friends with so it’s not like he is seeking her out. It’s also important to note that his trip was already planned and that she works for the team that plays and gets free tickets and was already going.<br><br>My gut reaction was no. I don’t want him to ever be around her. I told him I trusted him 100% but I didn’t trust her and that it wasn’t fair for me to not trust her when she has never done anything wrong. Neither of us have any family or friends in Philadelphia so it’s not like we could come together. <br><br>After telling him no I started rethinking if I was overreacting. She’s married and has two kids now. He is 100% committed to me and I know he wouldn’t do anything to jeopardize our relationship. But part of me also feel like I’m being too lenient. We have been together for 18 months and we already have a trip scheduled for the summer to meet each other’s families. <br><br>For him it feels like a once in a life time opportunity to catch up with her. But for me it feels like opening a whole can of worms. He is willing to skip the event if I say no. But I kind of feel like I’m overreacting at this point. What do you think? I can’t seem to make my mind up.