So there is this girl in my class who constantly gives me some kind of sings and I can't figure out if shes gay or not... When she talks to me shes all up in my face and she hugs and touches me unnecessarily.She talks about me and her getting married and she sometimes writes "I love you" on my papers and books,she grabs my butt sometimes and kisses me on the cheek.But it all seems to be a joke cause she just laughs at it.One time we were in the middle of a conversation and she just asked me if I want to be her girlfriend,I got really nervous so I asked her if shes gay and she responded like: "Me?Gay?Hahhaha I was just joking." and she just looked like she had more to say. She also points out some guys that are hot or cute to her,and she has had a couple of boyfriends.But this has gone on for about 7 months and I really don't know what to do.It's really bothering me cause everything I ask her she just laughs and doesn't give me a straight up answer. What should I do?