<human>: My boyfriend and I have been together for two years, and nine moths of that were long distance. Early in our long distance period, around September last year, he was visiting me in my city. 

We were on the subway together and I was telling him something then noticed he wasn't responding. I looked up and he was staring at a girl across from us. She was skinny, fit, and brunette. I'm skinny, but definitely not brunette, or as fit or traditionally pretty as she was. When we got off the train I went up the stairs, but I looked back and he was still on the platform, looking for that girl and watching her leave. 

He kept trying to see her in the crowd as we were leaving, and I asked who he was looking for but he tried to play it off, so I said look I know that girl was cute but we really need to get going. He said, "I know I know I'm sorry but she was just PERFECT I have never seen a girl that perfect in my life. I mean she was beautiful." Then he did that appreciative whistle thing.

I let it slide at the time because we're very open about finding other people attractive, but something about the way he said it and the fact that he was so obvious about it bother me. Shortly after I found out that the girl from his previous school he was infatuated with looked very much the same (brunette, athletic, etc.)

I know it's silly, but this keeps popping up in my head and I still feel hurt by it. Should I feel upset or should I just try and let it go once and for all? We have an incredibly strong and loving relationship, I just can't seem to let go of this.

Give me a shortened version of the text
<bot>: Boyfriend described another girl, who was nothing like me, as "perfect". It's been a while but it still bothers me. What should I do?