what to do about my crush (sophomore)

I'm a sophomore in highschool and have chosen to stay away from relationships until I met this one guy (also a sophomore) who seemed really cute with his green and hazel eyes, and he has AB honor roll and is a swimmer, so he seemed very interesting but the the point is I think I'm crushing hardd and when I first met him he said that he had a crush on this one girl that he had met on the swim team. (I've known him for about a year). 
But he's been trying to hang around me more often and comes to play piano with me and to plays and choir rehearsals. 
Well today after choir rehearsal I was waiting for my group of my friends resting my head on my hand while they walked over and he came up to me and stroked/lifted my face and said that I sang beautifully. And although butterflies were practically having a party in my stomach I don't want to interfere with him and his crush. I don't whether he likes me or her or what. I don't know if I should ask him either so I just wanted some opinions please . Sorry for such a long story.