What Should I Do If He Likes Me?

[Lana]

I'm in Seventh Grade, and am thirteen years of age. This year we got a new boy at school named Christian. He's kind of girly, can't play any sports, is not cute, and is not sociable. He gave me a note that said he liked me and he had a crush..
I don't like him at ALL and like another boy named Matthew who is very likeable and popular and likes me back. Christain is obsessed with me and in L.A. he read a sentence to the class using a vocab latin root word "affection" and read "I have a great affection for a girl in my class." And he was staring at me..I wanted to crawl in a hole.
Everyone was pretending to hashtag things and saying like "Hashtag, I'm really bored." And Christian said "Hashtag, I'm totally in love with a girl in our class." Which really bothers me.
He stares at me a lot and is kinda creepy.
How should I let him off that I'm not into him? I don't want to ruin my relationship with Matthew by trying to be concerned over Christian...