My friend has turned her back on me, what do I do?

My best friend has recently begun acting cold towards me. She acts bored and annoyed around me.

Theres a guy in the picture. She and him are very close and she has a thing for him. Lately he's been saying some stuff that makes it seem like he might be interested in her too. Except this will be the third year they've known eachother and it would be the first time that he'd be interested in her.

I'm happy for her, if he really is into her. I truely am. But I'm hurt that she's begun pushing her friends out of the way for this guy.