Search Results: telling friends about a crush

there's this guy in my class who I've had my eyes on ever since I've started.
Somedays I'd get a feeling in my gut telling me he likes me and then somedays he doesn't.
He treats me really different to other people I've noticed that im the one that He's always sticking up for, such as when we play sports he'll tell everyone to stop being hard on me and take it easy on me and when he notices that i'm in trouble he tells me "don't worry I got you". He used to always be the first one to say Hi to me but now he's gone quiet. When he sits next to me on the bus he turns the other way looking out the window with his back towards me and thats when I find it difficult to know if he does like me back, I feel like this is a bad sign. I've also noticed that he frequently says my name whenever he's around me. He's never been annoyed with me - whenever I make a mistake he'll show me how its done, He always asks if im okay when he sees me looking a little sad.
Does this mean that he likes me back, as a friend or he doesn't like me because he's just being nice? And what are some other bad and good signs?