My partner can’t cum anymore

So for the past six months my partner haven’t been able to cum during sex and rarely when I jerk him off! Or usually we have sex for half an hour, I’ve had my orgasm prob after 10-15 minutes and then just working on him having his and then we usually just stop and wait for hours and continue and then he’s quite fast.

What’s strange about this is that he has no trouble getting turned on and always gets super excited when I take initiative or if I’m positive to his “requests”. He gives me compliments and smacks my ass on a regular basis!

So at least it looks like his attracted to me, but my logic tells me that… he can’t really be attracted to me.

He blames it on him always becoming too warm… but what about the three first years we were a couple? Didn’t stop him then😂

Also because of this I want sex less and less because I’m starting to feel like I’m too boring or whatever. 🤷🏻‍♀️ but yeah still after two weeks of draught this still happens.

Any thoughts? 🥺 sorry that my English isn’t the best, I’m from Europe.