Guys not catching feelings after sex?!

How is it that guys can just have sex and not catch feelings at all. I (f17) had sex with my friend (m18) the other day and I can't stop thinking about him. I know I don't like him. But ever since we did it I have a want for his attention. I'm telling myself I won't have sex with him anymore because I catch feelings so easily. So do guys seriously not feel anything ? Idk what's wrong with me, this sucks we ruined a perfectly good friendship . 😩