what does it mean when you ask for forgiveness from your spouse because you made a mistake and they say one day i will?

they're a cold hearted snake

Apparently the "mistake" is going to take some time to process and come to terms with. It sounds like the "mistake" was significant.

Get on with life and don’t let it be blackmail for your emotions. You either move on together or its over.

Narcissist- run for the hills!

Thanks for BC.. hope you're ok