I got into a silly fight with one of my close friends and we haven't talked in about 2 weeks.?

I got into a silly, childish fight with one of my close guy friends. The fight was about having indoor or outdoor cats. We had the fight over face book and now every time i see him at school in the corridor he will just ignore me and walk straight ped. I really miss him. Although i think i should have won the argument im still willing to apologize and get everything to go back to normal. What can i do?