I'm going to tell friends to stop bothering me with their relationship bs
Why don't you want to help them out?
I have been annoyed by their relationship talk since a day ago when it got out of hand.
I get how annoying it can get sometimes, but they are your friends and you need to support each other. They confide in you because they trust you, and you need to respect that. You might lose your friendship if you keep shunning them.
What does it matter to them? the only thing that sis me.
That is a bit of an extreme on your end.   There must be a find balance where you can listen during times of need but set a limit when you are not comfortable with a specific subject.