Trudy wasn’t a good girlfriend. She dragged Nate away from his friends ever since they got together. She got Nate into a party that he didn’t even want to go to. But on the other hand, Nate should’ve stood up more to Trudy. He could’ve just told her that he has friends of his own too. I can see why Nate finally broke up with her in the end
Maybe his dad showed him. Or maybe Francis just has great taste in comedy.