I go over to her and say hi. Often complimenting her. Our chats kind of die out though. In the halls we smile and say hi.
Till recently her sister was also relaxed around me now she kind of also seems shy.
The only thing I can think of to make her sis shy when she was so friendly before is my ex spreading her twisted lies about me again.
Most Helpful Guy
It does sound like your ex got to at a least the sister. As for the girl well. You need to show her you like her and just ask her out. No more of this waiting for her to get comfy with you.
You need to show her that your sure you like her.
Now she might just be nervous not knowing you or your ex flooded her mind with lies so she is more nervous.