How can I get in contact with this girl I like if I don't have her # and she doesn't use fb a lot?

[shallowbread358]

I am going to be a senior in high school and I met this girl, she actually started talking to me here and there on class stuff and so I helped broaden the convo, within one month we really hit it off, or atleast I think so, cuz she started like a handshake, and after regents which was only a week long, I saw her and she gave me a huge hug, and we never hugged before, and I saw her one more time before school ended and there was absolutely no time to ask for her number so we can talk over the summer,
So my question is how can I get in contact with her if I dont have her #, and she rarely uses fb if she does use it?

Please help, I will answer any question you have, I'm good at advice, just not my own.