Why is my crush distancing himself from me?

I know this guy from begging of the school year and he's really nice. At first I kinda had a vibe that he have some feelings for me. there's this one time i came over to his house and he started to hug me and put his hand around me while watching a movie together. But after that day he started to distance himself from me like he would speak less and would have look into his phone instead of having a conversation. He would talk to other girls just as fine. I dont know why is he avoiding me is it because he moved on?
Why is my crush distancing himself from me?
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