A couple days ago, my bf & I were out when we ran into a close female friend of his. They chatted for a while & were playful with each other. After she left, he asked me if their friendship made me uncomfortable.
They became friends after we started going out, and I didn't say anything for months because I trusted him & respected his friendships, but I couldn't help feeling a little jealous over how close they were and how often he talked about her. So when he brought it up and seemed considerate of my feelings & didn't want to do anything to offend me, I decided to be honest about my feelings.
He told me that there's nothing going on between them, nothing to worry about and said “We’re not having sex if that makes you feel better.” And the whole thing blew up into a fight and we decided to take a break. When we were laying the terms for the break, he said that we could see other people during this time and "explore other options", and "jokingly" mentioned the girl as an example. Then day right after, he actually hung out with the other girl and posted it all over snapchat.
I know that technically, he's not breaking any rules, but the way he flaunt it feels extremely immature and inconsiderate of my feelings. Am I being too emotional/sensitive about this? Should I just move on and walk away from this relationship?