I can't tell if this girl I like is gay or not ((or if I am) I'm a girl, almost 17).

I am a girl and I'm almost 17. And I have a friend that I cant tell if She likes me as more than a friend.- I have had my best friend for almost 10 years (he's a guy) and we have always been really close. For a while now I have thought that we may be more than friends (standing close to each other in public and sitting really close while watching movies at home and taking naps together). And he was always on my mind until I met a girl in middle school and we became friends. And now I'm in high school and me and my best friend started growing apart (he has some problems) but oddly enough I don't care as much as I thought I would. Now me and this girl are really good friends now, in the past year we have been really close, and now it's at the point that we hold hands in public (I'm more of a tomboy and I know that girls sometimes do that). She teases me sometimes that we are married and she calls herself my Wife and calls me "Bae" and "my love" (which makes me kinda happy), When I make her laugh really hard she puts her head on my shoulder while laughing. She makes me really happy, weather she is just smiling or laughing or making a joke, she doesn't like awkward situations or talking to strangers, she doesn't care what others think, when she is sad then I get sad too, once she stated tearing up at lunch because she thought I was mad at her and I just about jumped off a cliff because I felt so bad (I wasn't mad, just a miscommunication). We have been hanging out a lot lately on the weekends (always with another friend too) and a few times she said she doesn't care what the group does as long as it's with me. We hold hands a lot and lock arms, but never anything more than that or a hug (she says it's just cause she likes holding my hand) she jokes about holding me or piggyback rides. She is really special to me and I can't figure out if I really like her as more than a friend or if it's just cause I never had anything like that (having a guy BFF and all, we didn't do things like that). I don't know if she is even likes girls, and I know she has had a bf before but she didn't really connect with him, and I know guys have crushes on her and sometimes text her (I can be a little jealous I guess). And she sometimes talks about the types of guys she likes not to me but around me. And I know she likes a guy right now and she says "I don't know why but I do" but she says she can't date him because that is her ex's friend and be believes in the bro code and he wint be at school next year and I think he likes her too. It makes me sick just thinking about it, the fact that she could love someone else. I don't know what I would do if u lost her, she is the closest friend I have now. I wish we could be more but I don't know if it's possible or if she likes girls (I know she is fine with gay people) or if she would give him up for me. We both want to protect each other do small but meaningful things. Maybe I'm just reading too far into this and hoping for what I can't have. I really want to know what to do.