First day of high school and found out that my bully loves me

At class

Now here we come, at my class it still feel unusual I just wanna say this to him but ... maybe someday he might like me.Until this guy Reeze sent a note and slip it to my locker and it says 'Meet me at the rooftop' and then I went upstairs and then here he was standing there being like a phoenix. And said this to me "Hi Boblina I like you so much will u be my girlfriend?" I said "Sorry I like someone else." He didn't reply and went inside. I feel uncomfortable and I feel like I'm being rude to people.