Straight? Friend

In my group of lesbian, gay, transgender, and gender fluid friends I'm known as the straight friend. Before I might have accepted this label but I'm learning that their are so many sexual orientations and gender identities other than straight cisgender female that I'm no longer satisfied with that. What hurts most is that my friends never asked if that's how I see myself. I'm sure they would understand if I told them I didn't like to be called the straight friend but I feel like they'll get all exited for nothing. I'm not coming out as anything really I just want to feel like I have room to explore outside the box of straightness. I guess I just want them to know that I'm curious.