so i kinda like this girl...?

I am a high school senior and I like a girl who is a junior. I think she likes me too but i'm not sure whether she wants a friendship, a relationship or just a hook up. This is the evidence. We had Spanish class together my sophomore (her freshman) year and during the first month she smiled at me in the hall and we walked to class together. I was kinda stupid back then and I didn't realize and I let the opportunity slip. I haven't really talked to her since then. However, recently one of my friends told me that she thinks highly of me. Also, at a recent dance, she came up to me and gave me a hug. I really wanted to go for it that night but she wasn't dancing and instead talking to a guy friend (not her boyfriend, she doesnt have a boyfriend) the entire night. I am wondering what you guys think. should i ask her out? and if so how? we don't have any classes together and I rarely see her. thanks for the advice