Search Results: uncomfortable around boyfriend

So I have this guy friend and he has a girlfriend and always talks about her, or his exes, or even random girls he thinks are hot, I don't really care and usually give him some sort of feedback about the girls.

We're relatively new friends, I've known him for about a year through mutual friends, but we recently started talking more and he reaches out to me almost everyday to talk otp, we usually talk late night. I noticed he only calls me when his girlfriend isn't around and I've also never met her. He got me a necklace from a popular tv show I like for my bday too. Worth mentioning that this guy is close friends with my ex boyfriend.

So I never really talked about guys I like or my exes. So I decided to try. Anytime I do he just gets quiet or says "mhm" but doesn't engage at all. I told him about one ex and how we had this romantic night and my friend just changed the topic. Even told him about a IG influencer I think is hot and he just ignored me. I also told him about a guy I wanted to hookup with but I was unsure, he basically said "why would u do that if ur not sure?" And when he called me the next day he asked if I went through with it (I didn't) and he said "wow I thought for sure you'd do it". Last thing, I was telling him about how my other guy friend said dating apps suck for guys, his immediate response was "who?", I was like "what do u mean who?", He goes "who said that?". So I told him my other friends name. After he got the name he then engaged in the convo about dating apps

I thought maybe he's uncomfortable talking about other men that way but he disclosed to me about another female friend who told him some guy played her. so he's not uncomfortable with it, he just ignores me I guess.

Am I overthinking this?

So I posted a photo of me on insta, it wasn’t sexual or anything. It’s just an “artsy” pic of me looking away from the camera, fully clothed (no skin showing whatsoever bcs I’m wearing a coat), with trees and leaves as the background. Then some guy that I know, that I have 0 history or chemistry with, commented “beautiful!”. I always reply to comments or at least give them a like, and since I don’t know him that well I just decided to “like” the comment and leave it as it is.

My boyfriend saw it and he flipped out. I understand that he might be uncomfortable with it but he started accusing me of flirting back with him, he said that I’m opening the doors to infidelity and that now he thinks that I flirt around with guys online (and offline). He started making all kinds of negative assumptions about me and even brought up my pasts (with my exes and all, which is all irrelevant…)

All I did was like a comment, I never talked to him not even in the DMs so I thought it was just a harmless comment. Is he overreacting or am I being insensitive?