About a week ago my partner and I broke up (his decision) he noticed how much I didn’t want this and agreed to talk it out like I initially wanted to. We didn’t have any pure reason to break up which is why I decided to get back together and talk it out. We spoke about the problems and I told him how I felt and he said he understood. We went out the next day and he started to make little jokes about what I said and mocking me while I was in a vulnerable state. He’s also been posting a girl in his Instagram but he refuses to post me because “relationship posts” are corny. I hope you guys can see where I’m mad with this and help me make a decision on what to do next. I don’t know if I should express how I feel or just end it.