If you invite her to do something with you, she'll accept. If she doesn't like you, she'll say something like, "I'd love to but I've got so much going on right now..."
It's likely that she will like you because you like her. That happened to me. Love can bounce back. (unless she doesn't like you) She will show the same signs that any girl would like these: Play with hair/necklace/scarf/bracelet/etc. (not at the same time! haha) Look at you Blush or smile or blush and smile when she talks to you It depends who the girl is.
me I like to hang around them alot like theres tnis boy I go to school with his name is austin lewis and hes HOT so I hint at it and I try to hang around him and talk to him alot like we were in gym 2day and we were riding carts with polyester wheels and he didn't notice but I was staring at him the whole time