Probably, but I wouldn't put money on it. I was out yesterday with two liberal couples. Their marriages have lasted as long as mine.
In talking with the women, we all admitted that there are times we are glad to have the bed all to ourselves at times, it isn't awful when we individually travel to something we are interested in and leave the spouse behind, and perhaps we're just too lazy to get a divorce. We also hit on the idea that you "put up with" the other person. We just forebear with one another.
Congratulations on a long life, well-lived. Congratulations on achieving 39 years of marriage. That is wonderful!
When kids got older, I told them it was OK to have friends that are Democrats, but never marry one.