I Hate Breakups... Even When They're Not Happening to Me

My friends K & C finally called it quits today. I just hurt for both of them... I think they've been together 12 years, and it sucks, and I'm really sad. Because I was K's friend first, but I'm C's friend too... and I don't know what to say to either of them, except I'm sorry.

And I know this is weird... but it makes me feel scared too. Like, if people like them could break up, people I thought were together for the long haul, what chance do the rest of us have?