Please Help Me Answering My Question

So here is my guy friend. He is always like, "you say, should I attend to this class?/ should I attend to this function?", "Tell me will it happen or not", "Tell me what should I do".

He is always like asks me any questions and gets my answer and then he believes it’s the truth, even if the answer in on the book or someone else's already answered it.

But when in class I see him looking sometimes at me but avoid me in person most of the time. It hurts me. He pretends like he doesn’t even know me. He has others friends - male female. He talks with them, sits with them. When in corridor he pretends like he cannot see me.

I have grown some feelings for him but he is always calling me "friend".

I also thinks him my best friend but he always make me understand that he dosen't want to be my best friend. So, I just let him be and don't insist.

I am exhausted. I am getting poor grades. He always makes me feel I am just a classmate of him at the same time, he shares his family issues too. He also praised me a lot but he does this to others too!

There are also something which don't feel good to me. I feel kinda used.

I am so confused and don't know what's going on. Please tell me, what should I do? Please I am begging you if you know the answer by your experience. Advice me please.