I have been married for 46 years. Spouse dependent. It's bigger than that. Over the years, each influences the other. We change. For the better, I believe. All those abrasive parts start to fall away and the parts that fit together remain. This wasn't easy :)) Or natural :)) At many points along our path we had to make conscious decisions to change, and to stay together.
So, spouse dependence. I guess so. But it's all about love and caring. That's the glue after all this time.
Interesting post, as usual.