26M and 26F following friend on instagram

Hello,

I (26F) am finally in a wonderful relationship of about 3 years with 26M and it has been the best one i have been in. my partner is super kind, understanding, and patient.

I recently came across this woman he follows on instagram, who he seems to be friends with, i think they used to work together. However she posts videos of herself in bikinis and videos of herself pole dancing and though he doesnt like those posts, ive seen him like some of her selfies before and she has liked his posts and its been making me feel insecure and not great about myself, especially because she looks pretty different from me.

Its just getting in my head about how I look and makes me want to kind of shut him out. And i guess I just feel like if i bring this up to him, I may look crazy. I know he's not wrong for following someone he knows and its not his fault she posts those things. I feel like if I brought it up to him, i would be crossing a line into "controlling" territory and I dont want to do that. I trust him completely, I think its more of how its making me feel about myself because I think she is the woman he would "traditionally" have a crush on.

I know if i brought it up to him he would be understanding and we would have a respectful conversation, but I don't know if i would be going too far for bringing this up in terms of respecting his privacy.

TLDR: boyfriend following female friend who posts raunchier videos and posts. feeling insecure but not sure if this is something i should bring up.