does your boyfriend or husband sent you sex often ?

usually when ever I want sex he says he's too tired, or he's busy with his games. anytime we have sex it's usually when he wants to. He said i was aggressive ( I had literally took my top off infront of him while he was playing his game and told him to suck them) then sometimes when we do have sex he can't cum. He says he's tired, or that I drained him, or that I threw him off when I asked him to fuck me from behind. anyone else having these issues? what did you do. I don't think he's cheating, he's 30- is it too early for him to be having E.D. or maybe just a lower sex drive? I feel like a pervert sometimes. Like I want it ALL the time.