My Best Friend Doesn't like me!

D: I don't know why but my best friend, Lauri, isn't talking to me! I keep calling her and she won't pick up, and when I try to talk to her at school she just rolls her eyes and walks away.

I'm losing my best friend...

I talked to my counselor but I don't think it's helping. Do you guys have any advice on what to do? She's been my best friend for three years and all the sudden she's ignoring me.