My neighbours son is 14 now. When he was 13 he was an absolute terror. He was rude, loud, incredibly mean and he used to verbally abuse his mother all the time. Then he left school for the summer, turned 14 and you would never say its the same child. He's all grown up, polite, well mannered and super close with his mom! I think its a stage. I tutored kids for one summer and I had a few 13 year old boys - let me tell you, I dreaded every session they came in.