Help, I'm confused?

As a girl, I claimed myself to be bisexual. When it comes to guys, i viewed them as attractive and I liked them, but then it fades really quickly. I realized that I am not into them after I’m physical with them and then slowly fade away from their life.For some reason, I never seem to become attach to them emotionally or physically. It’s more like a crush and when the relationship happens, it never feels right. When it comes to girl I’m attracted to them too,but I never been in an actual relationship with them. But I can easily become emotionally attached to them more than guys. It just when I’m with a girl, they are more emotionally invested than I am and then become possessive towards me.I play the more dominate role with them. So I’m just confused on my sexuality right now.