The way they react is utter disrespect. Even if you didnt understand that they didn’t like you, they didn’t respect you enough to tell you why they were reacting the way they were. Leaving you in the dark is an attempt to make you feel crazy or bad, to save themselves from the awkwardness of then telling you how they feel about the ways you interacted with them.

At that age its hard to know better, unfortunately.

All that being said, they may also just be bitches