What’s happened with my crush please helpp?

So my crush found out I like him. When I saw him he stared from far but when I got close he was grinning and looked down at his phone. I saw him again a few weeks later he fully turned saw me and then just stopped in corridor waiting around for his friend but I knew he was waiting for me to leave first. A few mins later when I got past the corridor I saw him walking down alone. So at this point I just thought he’s not interested and is going out of his way to avoid me.

4 months later he sees me and we’re on a shift he’s so shocked throughout the day he found excuses to speak to me. He spent the day observing me. He even waited around till I left so he could have a good look at me. There were similar behaviours in the way he wouldn’t come where it was just us alone. However he was giving body language off in a sense which he wanted me to initiate conversation? I was just wondering how come he would be bothered to do this after so many months? I just can’t seem to understand what’s happened.
What’s happened with my crush please helpp?
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