Why my crush doesn't approach me?

Anonymous
My crush and I have a lot of eye contacts but we haven't make a move. I'm completely sure he likes me back (he shows me almost all the signs) but I think he's too shy since even his friends try to make him approach me by pushing him towards me.
Now, it's like, everytime I walk past him and his friends, they whisper to him and he smiles (not a funny smile), without looking at me. If I stand around them but my crush isn't facing me, they tell him something and then he either completely turns his body towards me and stares or turns a little his head, pretending to be looking at something on my way even though it's obvious he looks at me.
He tries to be in the same place as me, even leaves for some time his class to walk past me (many times in the same hour) as I'm in the hall.
And, when he leaves a place, he takes a last glance, or stares or he looks from the corner of his eyes - it depends - at me.

Last day, I decided to make my interest obvious. So as he came, I looked at him smiling (he was already looking at me). He stared with intense eyes, that type of so deep look without being serious or anything. Like if his eyes were the way he felt.
The same day, I saw him another time and as we walked in each other way, he couldn't stop staring at me, even at the moment I passed next to him, he turned the head to look.
Another time in the same day, I was waiting alone the bus, he came to wait too (we take the same bus), a few meters next to me with a friend. As he was talking to his friend, he totally turned his body towards me, looking at my profile side. Even if he was talking he stared or watched me a quite long time thinking I was busy on my phone. But then I caught him, he stared into my eyes until I looked away. I caught him again a few minutes after but he only quickly looked away.

Sorry it's quite long but I need someone to explain me everything :)
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Someone knows why?
Why my crush doesn't approach me?
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