I'm going to break up my other two friends' relationship.
What is your reason for wanting to do this to your friends?
I don't like their relationship anymore. They shouldn't be together.
Interfering with your friend's relationship sounds like it would do more harm than good. Sometimes it is better to just allow those you care about to have their privacy.
I'm feeling driven to do it.
It is not great that you want to hurt your friends on purpose. Maybe taking some time for yourself would be the best option here to figure out what is driving you to want to do something like this.