Out In the Open

I don't know what to do with myself, I have the greatest urging to be sexual and I don't know how to contain it. I find if I went for a run I would.. I guess it would work to cleanse some of this energy
But I feel bad, I feel as though I shouldn't be feeling like this; I have a boyfriend and we both agree that porn is not a healthy option for our relationship, as it promotes the longing for other people "the more you itch the more you scratch" and because of past experiences, I'm scared my mind will wonder - even against my will, it will say 'I know you don't want to think about this, but because you don't want to so much I'm going to take you to that thought, just to make you feel like shit."
I think I feel like I am lying about my sexuality, and I can try and cover it up, but... I'm so attracted to females. I love big round bum cheeks that have depth and jiggle when a woman walks, and I love the kind of wobble breasts make, that smooth.. wobbliness. Don't get me wrong, I ADORE the male body, I especially love my boyfriends body. I honestly don't see anyone with a nicer body, he has one that is so masculine in all the right places, but not over muscular with some greasy tan that makes a guy appear vain and more worried about his appearance than I care about mine. He's big and broad chested, white as milk and blonde curls on his chest that humble my sleep.
but I'll keep it G rated (or have I already crossed that line?). Anyway the point is, I LOVE my boyfriend and his body as well. But I can't deny the mystery of the female body that lures my curiosity. I don't think I am bi-sexual, for if I was I'm sure I would believe there had to be some kind of emotion between me and a girl to do anything with her, as there is with males, but there isn't.
I'm scared of worrying my boyfriend that I will leave him or be into girls more than him, which I know I will not do and will not feel, I hope he can understand. I know he wont have liked this post, but I needed to get it out in the open, express myself so I didn't walk around the house finding a way to express my sexuality without doing anything that could degrade the beauty of Jade and I's relationship.