really wanna fuck this guy in my class

im 19 and i have a 6month bf. i got closer with this hot guy in my class, cause we would always be together in group activities, but just as friends. like we don't flirt or anything, and he doesnt know that i have a bf. and today he dropped me at the train station after school but we didnt kiss or anything, just a handshake. but i cant stop thinking about sex with him😩 ive seen his dick print many times cause he always wears the same baggy pants/ tight pants ish, and ugh. i love my boyfriend with all my heart and I don't have the intention to cheat on him at all. but i know its bad to have those kind of thoughts when you already in a relationship. and my bf knows im friends with this guy. i just