Trauma issues

Hey everybody I hope life is treating you all faily.. so the thing is I was in a relationship with someone who I have to see once every few months.. long story short it ended and now Iam left with traumas of them and their friends.. whenever I see one of them I just can't breath and Iam not able to focus on anything.. it sort of hurts.. last time I saw them together they were talking like nothing even happened.. it haunted me for days even though I have moved on from that person and I don't imagine them in my future.. there was a time I used to see trauma in everything.. Iam not speaking in detail because I don't want to remember the things they did to me.. My question is k kya traumas Kabhi Puri tarha heal hoty Hain ? Aur truly agy kis trha bath skta Hun mai?