Married to a man but...

I’m married to a man. I love him so much. We have a beautiful family together. However, I can’t seem to shake the urge to have sex with a woman. I so desperately want to kiss, touch, and have sex with a woman, but I don’t feel that I am a lesbian or truly bisexual. I know this seems attention seeking. But what is going on? How do I deal with this?