How could I get over him ?

I fall in love with someone, I know him for 8 month, at first i thought he love me back but now it like we barely know each other, he treat me like a stranger,
he is like this for 2 month and i fill like am losing him day after day, he totally changed with me he wasn't like this before he was always take care of me he always read my mind before i say anything, when i m upset he feel that without i tell him and he do his best to make me feel good, he always tell me that he doesn't want to see me upset, we were always together, we talk about everything, at first I thought we are just friend but later the way how he look at me how he talk to me it feels me like I belong to him, i don't know, but sometimes i tell myself what if am wrong, what if it was just illusions I created, but how could it be illusions, the way how he treat me, it makes fall in love with him, but now he is like someone else, he doesn't want to talk to me like before, we barely talk, when I look at him he turn his face ,it really hurts me the way he treat me, am in pain i can not stand it.... I don't know what to do, i wish i could run a way