Are breakups contagious?

Are breakups contagious? You might laugh at the question but, I have three friends who have recently broken up with their significant other in the past four months. As far as I was concerned they were all very happy in their relationship. But when the first friend broke up with her partner the others started to see concern in their own relationships. Whether it be just talking about their friends former relationship and the red flags that brought up their own issues I don’t know. But it made me wonder, are break up contagious?

Is this a completely crazy question, maybe, but there must be some truth to seeing your friends and their own relationships end that plant a seed in your own head to make a decision that perhaps you were brushing under the rug for sometime.