Was she being friendly? or does she like me?

Awww :). Sounds like a crush. And a connection. I think she likes you. If she is doing all of this already then i think you should ask her for her info. And then one day when you feel most compelled in your heart, then tell her how you feel. Dont mention the things your insecure about(like your weight) because she obviously doesnt care about that. So you shouldnt. Move on from that. If you haven't seen her then talk to her mom and politley tell her that your concerned that she isn't coming. Ask the mom if she is ok. Moms are smart so dont try to be sneaky, just simply ask if everything is ok with her. If the mom gives you an answer then prepare yourself for the next time you will see her. If not, hope that she comes back soon so you can tell her. Dont be afraid love. Good Luck :)