I've been questioning my sexual orientation since I was twelve. I'm getting pretty sick of being in the questioning phase. I can't decide whether I'm bi or lesbian. I just keep going back and forth and I so sick of it.
It may be that you're one or the other, but it changes over time. Something I've read recently is that sexuality is fluid, especially in females. Or, it could be that you're bisexual, with a preference for women. It might help to try not to focus so much on putting a label on it, and just pursue attractions as they present themselves to you as opportunities. Try not to stress out too much about it. If you need to talk, you could always message me. I'm trying to figure this out for myself, too. =)