Your two best friends, Jenny and Gina, are fighting. This makes you feel uncomfortable. You feel like you are caught in the middle and have to choose between two things that you care about.
Sounds like you are in the middle of a situation with psychological inequality. Fritz Heider was a social psychologist who developed a theory about situations involving psychological inequality. He called his idea balance theory. His idea was that we want to maintain psychological stability, and we form relationships that balance our likes and dislikes. In our example, you like both Jenny and Gina, which makes the dislike they are feeling for each other difficult for you to deal with.