Sexually frustrated

Sometimes I'm so sick of my relationship with my SO, all he wants is head I swear I get more play from my vibrator, I mean don't get me wrong we still get it in from time to time but, everytime you turn around all he wants is head head head, I mean we still make magic from time to time but damn come na if you not willing someone else will..smh and it's my birthday weekend haven't gotten any sex, at all but he got the nerve to think I'm sleeping with someone else at times, maybe I should you not doing it I'm sexual frustrated only so much a woman can take...