So to start this off I don't think I'm in the wrong at all. My cousin has a bit of an ego and blames others for his own problems. 

Anyways, my cousin for whatever reason can not license a car under his name. I believe it must be because he owes money to the license issuer but I can't be sure. So, he comes to ask his one cousin that might help in this situation. He offers to pay me $100 and I who needs help paying off a ticket a few months ago accepts. 

Fast forward a couple months later, I unknowingly had my license suspended because I forgot to schedule an appointment for a defender drivers class. I've been driving everyday since and had never been pulled over so I consider myself vey lucky. A couple days ago my cousin got pulled over because they ran the plates on his car that is under my name for a reason I'm not too sure(could be random or recklessly driving). So as they run the plates they see my name and realize that my license is suspended and think that the person driving the vehicle is me only to find that it is not. We live in Canada and weed is legal and they treat weed similarity to alcohol. You can not consume it in a vehicle and can not drive high. Anyways, he gets his mouth swabbed and the police find out he is impaired and impound his car and give him a $750 ticket.

After this incident, my cousin texted me with a novel worth of text messages explaining what happened and getting pissed at me, basically saying it's my fault. He was saying that he paid me $100 and couldn't even keep my shit together and make sure my license wasn't suspended. I told him he shouldn't be smoking and driving and it's shouldn't be my fault and he replied that I am the asshole and at least he had the decency to tell me that my license is suspended so I wouldn't get a ticket.

He doesn't seem to believe he's the asshole in this situation, but I can only see how he is. Sure I messed up by forgetting to schedule an appointment and having my licence suspended, but I didn't have to let him registered his car under my name. AITA?