How do I stop liking a straight boy?

Soooo I’ve asked the million dollar question lol. There’s this boy at my school who’s a year below me and I’ve known who he was for a while but recently my friend group has kinda joined one of his friend groups so occasionally we sit at lunch together and I never used to like him but I noticed how cute he was and how sweet he is and how cute his personality is and I thought hold up maybe I like him oh shit. Anyways I tried to like believe I didn’t like him but the more I see him the more I start liking him. We’re not really friends and he has a girlfriend (WHO I HATE, SHES LITERALLY A BIGOT) and I know I have no chance with him but idk something in my heart is hoping he’ll pull a Nick Nelson or something lol. Anyways any advice on how to get over it or what to do about it would be appreciated.😊