Boyfriend doesn't last long help

This is incredibly frustrating for me, we just started dating 3 weeks ago and the first few times I didn't mind it as much. Thinking he will get better over time.

Don't get me wrong, he feels horrible about it too but for some reason he just won't last long enough.

I can't keep acting like it doesn't bother me, and I'm sure he realises too. But whenever I moan a bit louder, he would just finish. Even when he masturbated beforehand! We can't even go past one sex position

Any help ladies?