Sexually frustrated

My boyfriend and I have sex 2 times a month. We work different schedules but he's the one that's too tired for sex. Im 35 he's 40. I feel like cheating or just breaking up with him that's how rediculous the situation is. I brought it u once and nothing changed and I refuse to ever bring it up again. I'm sexy for my age and I'm in my prime for libido. He does act like he loves me in other ways but please comment I need advice what would you do