Help! Do I like this girl?

I am a girl in high school. I think I am bi, and lately have noticed I feel differently about a good friend. I sometimes get jealous when she talks to others (not great behavior, I know), and I’ve noticed that I sometimes have moments where I feel overwhelming fondness and affection (I’m having trouble articulating this) when she’s around. I don’t really feel these things around my other friends. I notice things sometimes, like the way she smiles in a certain way. I sometimes want to have greater physical intimacy (not sexually!) around her, and feel urges to cup her face, or hold her hand. I think about kissing her (she’s very attractive) and it’s not an unwelcome thought. I know she’s straight, but emotions are confusing, and I’m not sure if I just like her as a friend or if I have a crush. If you have any idea, please help me out!