Well my bisexuality has been confusing me lately too. I'm not sure I have any helpful advice but I have a few thoughts.

For me, I really don't think I realized I could fall in love so deeply with a woman until it happened. So I guess reading what you wrote (though I don't know you that well or if you've had a chance to really be involved with women) I wonder if the reason you don't feel the deep attachment with women, or don't think you would, is because you haven't had a particular person to attach to?

I mean I don't think fantasies are the same as reality as far as emotional feelings go, and you've probably had a lifetime of hearing male/female romantic stories to boost the fantasies.

Well I could be totally off because I'm thinking a lot about just my own experience in this, but those are my thoughts.