Surrounded by seperation

[Nickelcity]

I'll start with my situation first. I got married 7 months ago to my girlfriend of 8 years. We bought a house 4 months ago.

In the last 6 months, 3 of my close family members have decided to seperate from their spouses. The first was my cousin, whose marriage lasted 6 months before he packed up and got his own place. They had lived together for 8 years prior to getting married. Next, my brother, married for 10 years with a child has decided he and his wife are seperating. Now, another cousin, married for 20 years with a child, have decided to seperate.

These 3 couples, as well as my wife and I, are all close and hang out a lot. All these break-ups are upsetting me and I want to remove this poison from my life before any of these feelings enter my marriage. My wife and I want things to last and although everything is fine now, we're concerned that just associating with these people that the notion of seperation may enter either one of our heads.

I don't think there is any coincidence that they have announced their seperations within 6 months of each other. Obviously the thought has been there, and it took 1 of them to open the flood gates.

These 3 couples were all married before me, and I had seen characteristics in each marriage that provided a positive example for my decision to get married. They all attended my wedding ceremony and reception.

Am I justified to reduce my contact with them to not only remove the negative influence of seperation, but to also show my displeasure and disapproval of their selfish and cowardly decisions?

I have not told any of them how I feel, I care for them very much, but I'm not sure it's my place to say anything.