What do you think i should do, and what would you do!? please help answer :)?

I like this boy. and he possible likes me. I know this because he sorta pretends im his girlfriend, in a playfull way, like he comes up to me and puts his arm around me, i just stand and giggle cus its funny! Now he starts kissing me on the cheek. I really want a relationship with him, but i told my bestfried that I would have anoher relationship until im in a diffrent year in school, What would you do, adn do you think he likes me!! thankyou :DD