How do I get over liking her?

There is this girl in my orchestra class that is a year older than me. I really like her but she is pretty popular and has a boyfriend. The thing is, we are at least friends and we have been getting closer to me over the past few months. She ocassionaly does something that makes me wonder why she would do it of she didn't like me in some way but I highly doubt she would have feelings for me. An example is like when we went on an incline with a group of us during a trip we took, she was kinda freaking out but also trying to be funny by being over dramatic. She laid down on the bench next to me and kept saying my name and kinda acted like she wanted to put her head on me. Another time, she sent a text in a group chat with my good friend in it and she was sending pictures of our trip. She said oh I don't have (my name) number, at least not yet 😏. Then said lol jkjk. A few days ago, her and her friend were arguing about handshakes or something and her friend came over to me and motioned for me to shake her hand. I know her pretty well so I just shook it. She said I had a terrible handshake lol but then the girl I like cane over and shook my hand too for no reason. She is already in a steady relationship like a mentioned but could these mean anything?