Pouting lips and signs!?!?!?

Hmmm... somebody may have a crush on you. Then again, maybe she just likes being with you as a fun friend, and nothing more is intended, other than being playful and teasing you. This is something you'll have to talk with her about, and let her know what you are feeling and thinking. By your description of her, this shouldn't be a problem at all, for either of you.