My gut reaction, is a snarky remark. So, he is now the one diagnosing you? Aren't you dealing enough with working through things, knowing you have bi-polar, and now, a husband that has declared you a narcissist.

You can only keep doing the best that you can, to be the person that you are, and plans a,b & c in learning to cope and survive and be happy, sound like good enough plans to anyone.

Takes two to tango, you sound like you are taking steps to own your half of the ups and downs of your relationship, other than 'labelling' you, which sounds like blame placing, what measures is he taking to uphold his half?