In the crush, there is a kind of behavior (girls mostly), in order not to let the other party know that they like each other, they deliberately cold each other, in fact, they like each other!
This behavior is more common, many boys do not understand, or do not understand, and thus there are many tragedies. Some of them are direct imitations, he should have a crush on you! I once fell in love at first sight with a girl, wanted to see her, but met her without daring to look at her! Suppose he liked you, and the reason for being hot and cold was that he was deliberately cold to you, whereas when you were alone together, it was different!
It's still too early to say he likes you! At the same time, other factors cannot be ruled out.
I hope it may help you!