Well, I'm pretty sure us Gaians can't help you about if he likes you or not just by listening to how he acts around you. We 1) never met this guy. 2) We only heard how he acts around you. But we don't see how he acts around you. So we can't really tell. 3) Body language can always be misinterpreted.
But, I can say that if your confused, and you want to know for sure he likes you..then ask him.
And if your concerned about his sudden change in personality, then ask why he's being mean toward you.
Hope that helps. &&