is she still a friend?

I've been best friends with this one girl for quite a while, and now we are in our 2nd semester of High School freshman year. She's been acting really weird lately. This has happened throughout the year at various times but not so much as it is now. Whenever she sees me, She makes a disgusted face and turns away. 2 days ago, I pushed into her in a friendly way, like you might do to one of your friends and she got all annoyed. She called me embarrassing to be around. I felt terrible, and today I tried saying hi to her and she just brushed me off. Although, when she isn't around her school and her friends, we are so close. It was recently my birthday, and she came to my party and we had the time of our lives. We also skype many times and have so much fun. Just recently, she hasnt been responding to ANY of my texts or skyping with me.

I don't know what to feel as we have been best friends for so long, and all of sudden it's like she is trying to make herself more distant from me. She even said I was embarrassing to be around. Should I still call her a friend? I mean if you're embarrassed to be my friend, then I would not like to call you my friend. But the problem is, we've been best friends for so long, I just don't know what to feel.