Is he like me back or he just think in sex with me?

He knows I like him and his friends, and I was chasing him for a long time, after a while in a day his behaviour change he rasis his voice when he see me and he try looking at me and I don't look then while I standing he looks at my waist in front of me then he go!
Is he like me back or he just think in sex with me?
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