Well, people grow apart from each other, usually during highschool and middle school as well, cause that's when you're meeting a bunch of new people. And for how do you get over it? It'll be hard, it just takes time though, when you've come to the realization you've essentially lost a friend, it hurts.
But we all move on at some point, your friend is hanging with a new group of people, and you probably will too.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.