It’s not. We had this same issue in the summer. He got snarky with me and I waited a while and then confronted him via text and we argued and then I left him out of a vacation we had planned together and went on my own with my son and he got mad at that and I felt bad and we made up.
Oh......well it sounds like he is who he is unless for whatever reason he didn’t understand the seriousness of how you felt. I know I personally couldn’t take it but I think you and I are wired kind of the same in that regard. I tend to give people the benefit of the doubt at my own expense. I know it’s hard and I have my own issues I am dealing with but I would just say to be true to yourself. Hang in there!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.