Autumnleaves, you are very much not alone in that. I posted about it not too long ago actually on this forum... I fight every day for those fantasies not to control me. :/

But yea, it's normal. I have about as much advice as Shayatanica.

Shayatanica, an open-minded bf isn't a bad way of coping. Just make sure it doesn't get out of control (though I think you know that)/