Too much 🙄

Destiny
Okay, so I stay with my boyfriend weeks at a time and every night he always tries to initiate sex. Some days, I'm all for it, but he wants it every single night.
We've been together for over a year and he tells me all of the time "I just look at you and want you" and "I just want to kiss on you". And im flattered, but there are just days where I am not up for it and I tell him that but he continues to try every night.
He says he has a problem..and I'm kind of thinking he does. And I don't know what to do or say but he gets sexually frustrated when I don't want to have sex with him. After I turned him down tonight, he told me he was going to bed and turned the other way. What do i do?