Why does he wait for me?

A guy I like has been doing this thing lately he would wait for me for class, no one else waits for me even my friends walk off without me.
He would wait for me but in a sorta subtle way, he would get up from his seat and if im still sitting or getting my bag he would stand looking at me (even if his friends have walked off), he would slowly go towards the exit but stop a few times to check on me but walk off when im walking near him.
Why is he doing this? Is this good or nah?
Why does he wait for me?
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