Guy I like secretly has started being off with me?

He doesn’t know that I have a crush on him, I would tell him but I have a really bad fear of rejection. Recently, he’s stopped responding to anything I post and doesn’t message me first anymore like he has done for months. Even when I do initiate conversation, either by responding to something he has posted on social media or just in general, he cuts off the conversation really quickly. He has only started being like this the past few days and even when he is going through a tough time he at least, barely minimum, responds adequately. It’s never been like this. I think he’s been talking to another girl, that he also likes himself but I can’t tell and im really sad. I don’t know what to do.
Guy I like secretly has started being off with me?
Post Opinion