Does she like me or is she just doing whatever?

im in high school and am a male.

When I was in sophomore year I had class with this girl ( I don't even remember but she says she was), now me and this girl are juniors. We have one same class. She started talking to me because i think we sat at the same table due to seating chart. We started normal conversations but it got weird. She started to find my home address so she can "stalk" me and asked me and my friends for my number. Me and my friends didn't give her anything but she somehow ended up on finding my number and texted me once and stopped. She and her friend gave me an embarrassing nickname sorta. She says hi to me sometimes when she is with her friend in the hallways and she says it with a surprised voice ish. She kinda acts like a complete and total ***** when we are in class together.. What do u guys think?