What to do with this girl.?

Im in high school and im 17. I like this girl we talk all the time. We text in and out of school. She loves touchin me in school and we hug alot. I want to get into a relationship but she just came off a relationship and i just dont know if shes that into me.Only thing is we sit together in cles. I don't want to ruin our friendship in case everything doesnt work out. It would be akward to sit together in school coming off a break up or something like that. what do i do?