Boyfriend keeps joking about his ex's body and says I'm "weak minded" for being upset - am I overreacting?

My boyfriend and I have been together for a 8 months. A recurring issue is that is that when we drink, he makes comments about his exs body that really hurt me.

The first time, we were very drunk and he joked that he liked his exs boobs better than mine and even compared details about them. I was schoked and hurt but brushed it off because we were intoxicated.

Another time, we were drinking again and I was online shopping. I read a review where a woman posted a photo wearing the top. He said "she cute," which already made me uncomfortable. Then, out of nowhere, he again said "my ex had nice boobs," and we got into an argument.

The next day, I explained that I'm insecure about my chest and that hearing him praise his ex's body makes me feel like he isn't over her or that he prefers her. He apologized and said he was "just joking" and promised to stop making those comments. However, he also said I was "weak minded" for letting it bother me.

I'm still really hurt and can't seem to get over it, even though he apologized. Am I right to be upset about this, or am I overreacting.

Also, is he over his ex if he says he still loves her? As a friend... supposedly. He just told me he would still like to talk to her. That makes me think he misses her. They broke up 2 years ago.