Most Helpful Girl
You are coming on too strong. Are you trying to have her talk to you every single day? No way. She's trying to force some distance by not responding..
She gave you her Facebook and accepted request because there's nothing wrong with having friends.
Give it sometime. You need to grab her attention with something really good. Wait about a week, then either try to run into her at the stop again, or wait until some big event is happening and invite her to it