I hate being bisexual.

I absolutely hate it. I'd rather be straight or lesbian. I've been with my SO for almost 2 years now but recently I have the undying urge to have sex with a woman. I haven't had sex with a women in over 5 years and I miss it terribly. I hate being attracted to both sexes because I can only have one and desire the other. My cravings are getting so bad and my sex drive is so high. My SO can't keep me satisfied as he has back problems and can only have sex once a week or less. Any suggestions? Toys/masturbation are not helping!!