Working on 34 years of marriage as we speak. I'm bipolar; my husband is not. Our marriage works because we're both invested in it, and because he is willing to be my caregiver when I need one. There really is no recipe for success in marriage, even when one or both partners do NOT have a mental illness. Don't let statistics bother you, and by all means, do go for therapy....it can't hurt, and it may give you the tools you need to cope with being married to someone who suffers from bipolar disorder.