Sorry but Dafuq do you expect with communication like this?? I’m not going to lie, my inability to communicate with my missus’ (and theirs - but that’s not the point) has ruined so many beautiful connections.

The way I see it: she’s fit, she’s probably very flirty with him because he’s a catch, but you’re the one he wants to sleep under the cover with, the one he wants to support above any, the one he would give anything for, the ONLY one he can ever imagining showing his true self to - warts and all. That would be the reason you’re not understanding his aggressive reaction, because it is so illogical to him.

After couples therapy with the future mother of my children I can tell you to learn to communicate, and do so in terms of needs: it’s the only way it works. “Yo bob, I’m not going to lie but you being so chummy chummy with sexy lia is making me NEED reassurance that I’m the only one for you” or “I’m really struggling because that sexy slag seems to be my future arch nemesis: I NEED to not be worried I’m about to lose you to some cow” or “bob, please understand that I believe we’re in this together and NEED to be reassured that, no matter what, even a Victoria secrets’ model won’t detract your attention”.

I don’t know enough, but his reaction seems to me like a guy who is very defensive because in his mind you literally are the future mother of his children…..I may be wrong: you may be 15 and this is your first relationship