DOES HE LIKE ME?? Or flirting with me?

I have known him since my junior yr in high school he was a senior then. Now he is a freshman in college. I am a senior. I am Sikh Indian girl. He is Pakistani Muslim boy. He was in my class junior yr. But now he is in college. I send him a friend request on facebook. I liked his 2 pics on facebook and he liked my whole picture album?I asked him why did u accepted me to your list. I am your friend right??? He said yeah. I asked him why don't u add more girls he just said that he does not need that many girls? Whenever he posts something on his wall I click like it. When I'm on facebook I like his pics and the places he went to. I am the only Indian girl who is from his school and were in the same class too but we never talked.....we basically were not friends then..... we become friends on facebook. He does have girl friends on facebook about 3 american . But he rarely knows them. There is one girl who always likes his status, pics, places on his wall everytime, I dont like his status everyday but when I find out something interesting he posted on his wall then I like. If she comments on his wall he comments back to her. But when I comment once on his wall he not comment back. I wrote Have fun swimming....:) when he posted going swimming. But he chats with me 1 or 2 hrs? If he has to go then he says he'll chat with me tommorrow and comes back at that same time. I can't understand does he LIKE me???