I can understand how debilitating these mood swings can be, since I am bipolar. What is your diagnosis? Have you seen a psychiatrist about your symptoms and/or a therapist?

When you are really feeling down, I suggest you get in touch with a professional. It's understandable that your partner gets distressed about it. But please try not to feel guilty. These feelings are not something you can easily control.

I am wondering if you might have some version of bipolar disorder.....

How are you feeling now? What can we do to help?