<human>: Can you provide a brief rundown of the text in within 3 sentences?

My BF and I have been dating for coming up on 4 years. I'm 23 he's 24.  We've been though thick and thin together and its very hard to imagine being without him.  

He makes me a better person, and I like to think I do the same for him.  We've always been able to work through our problems before but this one seems to be sticking around like gum to the underside of a desk.

I simply don't have the sex drive I did when I was nineteen and we were living apart.  These days I'd say we average twice a week, but he asks/tries at least once a day.  I hate having him down constantly, and I hate it even more when he becomes whiny and withdrawn after I turn him down.

Its been going on for about a year and a half, we've talked about it what seems hundreds of times. I've tried many so many different solutions, but it keeps getting worse.  Last five or six times we've talked about it he says he can't stay with me if this is way its going to stay.  In one sense I feel like he's threatening me, in another I feel trapped because I don't know what else I could do, and in other I agree with him.

Maybe we're just sexually incompatible? Anyone have some advice? Maybe something else I could try?
<bot>: 23f + 24m together 4 years.  Currently having sex ~ twice a week. He wants more, threatening break up. Advice?