Citizenship base on an Irish citzen

[Karinaresina]

Hi guys,

I applied for my citizenship based on marriage with an Irish citizen, but we aren't together anymore.
She is leaving Ireland now and I don't know if we should go to the immigration and tell them we aren't together anymore, or just send a letter changing my address in case they send something to her address which is my previous address.
Im afraid to tell them we aren't together anymore and it make them reject my application.
What should I do?
Thanks