i need you're guys opinion. Ok so ive been with my bf for about 3 months now and i saw that on his Instagram he still has a picture with his ex. Its a prom picture from years ago. we are both 20 now. but anyways when i first saw it i didnt really think much of it. this is what i thought "ok its a prom picture. prom is a pretty big day when you're in highschool" so i didnt really get jealous just a bit. then a month into our relationship he brings up prom just casually because we were talking about highschool memories. So anyways he asked me if i had a date for prom and i said yes then he asked me was he hot then i was like no not really we were just friends. then he said "i had a hot date for prom" and i jokingly said "oh its because she felt bad for you so she went with u" then he kinda was like "WTF she was my girlfriend" but he said it so defensively. then he went on on how she was so pretty amd sje was so funny blahh blahh blahh. this really irritated me. so i just sat there and didnt say anything. So this was the only time he brought up his ex and whenever i see his insagram i see that picture and it bugs me. It makes me feel like hes not over her. Like when i breakup with someone i always deleted every single picture that i put up on social media. but idk he never talks about her but its just been in the back of my head ever since we had that convo. am i just over reacting?