Just thinking

Don't love hurt,sting and a few other things I can't say here.It is good we humans fall in love.But seems we can fall out of love just as quick.I have a friend who is my age and married to the same woman for 38 years.I find that so amazing and wonderful.I wonder what their secret is for such an enduring relationship?Like the old saying,guess it's true,better to loved and lost then never loved at all.