My wife and I married in 2010 after a year of dating. Many of our friends married around the same time, but now all of them are divorced — some with kids, some without. A few are living comfortable single lives with nice homes and holidays.

We’re still together and have two boys, 15 and 10. Like any couple, we have our ups and downs, but I’m committed to our marriage and family.

Lately, I’ve noticed that some of my wife’s divorced friends often highlight how great single life is — full of freedom and independence. After spending time with them, my wife’s attitude toward me changes dramatically; she becomes short-tempered and distant. One of these friends, divorced four years ago, has gone through several boyfriends since.

I’m trying to make my wife see that these friends may not have the best intentions and could be envious of our stability, but she doesn’t seem to believe me. I don’t want our marriage — or the security we’ve built for our boys — to fall apart over outside influence. How can I help her see what’s really happening without sounding controlling or critical?