Do they swing that way?

Hey -

I'm going through a pretty serious questioning time right now and at this point I'm feeling very much sexually attracted to males and females, but only romantically/emotionally attracted to females.

For me, the romantic/emotional attraction is vital in a relationship, so right now I only feel the need to reach out to women.

However! I'm finding that it's incredibly difficult to reach out to anyone. I've never been on this side of the "equation" before, where I have to be more open to making moves and asking girls out. It's always been the guy that did that with me. I don't have a problem doing it, I just don't know how to go about it.

First of all, I'm extremely nervous because the girls I am attracted to are ones who might not swing that way, and I don't want to make anyone uncomfortable. Then there's that obvious fear of rejection that I've never had to deal with before (I finally understand how intimidating us girls can be.)
The biggest problem is that there is no way for me to know who is open to a homosexual relationship, and there's no way for anyone to know that I'm open to a homosexual relationship. If only we all wore t-shirts that said what we wanted, haha.

For example, I'm attracted to a couple of girls that I'm acquaintances with at my college. There is little to no evidence that they are open with their sexuality. So I risk making a move and ruining a potential friendship and also seriously feeling embarrassed.

I'm ready to begin exploring this side of my sexuality, but I'm struggling to find the courage to make these moves!

Thoughts are much appreciated!