Sorry but this is going to be a long post, but please hear me out here, god knows i need help on this. So things have started to come up, troubles with my cousin namely. He has gotten horrid and mean to his mom (My mom's fraternal twin), he avoids her, hangs up whenever she calls, talks back to her that would make a brat blush and a whole lot more.
It started this summer, first it was small but then it escalated to the point where he won't come to my little sister's birthday tomorrow because his mom will be there. Well to get a bit understanding i am going to have to explain a few things, like the reason i am telling you this; ever since he was little, me and him have been great friends and really close, so my mom wants me to go and talk to him about it, see if i can get some understanding in the case. His parents are divorce but that was like 2 or 3 years ago, though the problems started just this summer
He suffered from bedwetting for 3 or 4 years ending when he was around 8-9 years old, we had sleepovers a lot then and i personally didn't mind if her wore pullups to bed, i never mentioned it and never made fun of it. He is 13 now and yes, he is one of those people. He plays COD, namely the newer releases, he plays Assassin's Creed and GTA V (Quite a lot, i think he is level 60 something now). I have notice a change in his behavior, but just being annoying, like inputting a single letter when you are writing the password to your computer or never stop pushing random buttons whatever you are doing.
And to answer future questions, yes, he lives with his mom and dad separately, i think it is either weekends or weeks that his dad has with him. They both starting dating again and both live with that mate. His mom has moved 2 times since the breakup while his dad lives at his childhood home. He has also said that he hates his mom's boyfriend even though they barely speak or even interact with eachother.
So the bottom line is, i have to talk to him since he looks very much up to me, me being his older cousin by quite a few years. But i have no idea what to say, i have no idea what causes this hateful behavior towards his mom, i like to study psychology in my spare time, and human behavior the part i like the most, but there is no clues here, if he would be mad about his mom not giving him enough attention (which she has) then why does it not mirror to his dad as well.
Any comments or thoughts would be greatly appreciated and any questions you have will be answered. Thank you