Similarities between characters in my group

Some interesting similarities me and my group came across mainly handle the main point and message of the story. Most of our book contain someone being sick and or leaving in some way or another, ultimately separating or coming close to separating them from the one they love. In my book, Margo leaves Quentin, running away from home. In Philly’s book, The Sun Is Also a Star, the female character is going to be deported, separating her from the person she’s in love with. In Lauren’s book, Everything Everything, the female main character is sick and unable to go outside, preventing her from visiting the one she loves, the male main character. And finally in Meghan’s book, The Fault in Our Stars, both the female and male main character have cancer, and it is indeterminists if they will pass away or not, which could separate them. So, we all came to the conclusion that our books have similar plot lines, with the two main characters, usually lovers, ultimately get separated or come close to separating.