Guy I like...?

Ok, you said he plays the cello, right? So are you both in band or something? If you have any cles with him, just think of a nice compliment or a conversation starter, like, 'You really play the cello well. How long have you been playing?' Everyone likes to talk about themselves. So if you show interest in him, he'll show interest in you. Just don't act obvious or desperate, just be chill and yourself. Good luck!