Hi Robyn,
I cannot speak for divorce. I can share the fact that I have broken off long-term relationships, including an engagement. It was the sane thing to do. I have no regrets. My life has only improved.
It was tough, at the time, to let go of the miserable/toxic relationships, as we come to love those with whom we are close, even when there is some toxicity involved. It's tough to give up and to say "goodbye." These are necessary losses, losses which open up new doors, show us some new possibilities.
I have been married for 22 years. We have had our ups and downs. In the earlier stages, we needed some help via marriage counseling. This really helped us to communicate better and to understand one another much better. Our trials have only brought us closer. Our friendship has continued to grow over the years. We are truly best friends.
Letting go of relationships we have outgrown leaves room in our lives for new relationships, ones in which we can continue to grow together.
I hope this helps in some way.
My Best to You,
WC