Why he do that and what that mean?

Me and my crush (we never talk, we just make eye contact), but these days I ingore him and he always looks at me and want my attention, When I was going to home, he was with me in the lesson, I found him standing on the street I was walking in and I looked at him and he looked at me, I walked and found him behind me while I locked the door of the house, I found him looking at the house

I am so afraid, why he do that and what that mean?
Why he do that and what that mean?
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