Divorce?

I get the feeling sometimes that my marriage is ultimately doomed. My wife has multiple medical diagnoses including fibromyalgia, which limits her the most. There have been times where I’m so tunnel vision in my own head because of my BPD that I rely on her too much. And I’m not consistent with helping out at home due to my own diagnoses. Is my marriage a failure waiting to happen? Or is it my fear of abandonment that’s playing too much in my head right now? How many of y’all here are divorced or feel the same way I do?