Wait, what.... First of all, tell him your feelings that you want to be with him when you're alone. Second, start talking dirty level 1. If he accepts then POOF. Hope this helps. :L

Just act natural if you don't wanna loose him. :L

Break up, he deserves it

I dont really understand, you have a boyfriend but you are attracted to women and not to him?

If I understand it right then I think you should talk to him about it, if you dont want to be in a relationship with him then you should better break up, the longer you will keep it going the worse it will get for you and for him in the end too.

And well ofcourse it will be hard and you dont want to lose him, you can always ask him to remain friends and still hang out now and then. But just remember that it doesnt always work out as friends too when you had a relationship together.