What should I do (Arab guy)?

Some months ago I met an Arab guy that I like very much. The first time I saw him was at class and I saw the way he raised his eyes and looked at me as I walked by and he kept staring at me. We soon became friends.

He flirted a lot with me and I flirted back at him, we spent a lot of time together and everyone thought we were going out; he was always smiling when he was with me.Suddenly he started to change and he slowly stop being with me and since then I don't see him smile that much. I asked him if everything was OK and he said that everything was fine.

Out of nowhere he asked me if I liked him and I said yes. I asked him if he liked me back and he never answered but instead he told me he had a girlfriend back at home, so we stopped talking to each other. However, at class, he still sits close to me and pays attention to what I say and stares at me frequently.

I was so hurt about him flirting with me and having a girlfriend at the same time. Later I read on the Internet that for arabs, usually, their parents choose their girlfriend and they have no choice, and if they have a girlfriend it means that they have to marry her.

He stares at me so much and I see him so unhappy, but I have the feeling that he likes me and I don't know if my intuition is right or I'm just fooling myself.

I like him so much and even that from the outside I keep smiling and I pretend that nothing happened, I'm so sad in the inside. I don't know what to do or what to believe.
What should I do (Arab guy)?
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