Is he wanting to come back and work on the marriage?
And, do you want to work on the marriage?

If so lets start from there.

But first off. Do not do anything about this with your H. Lets get you ready to deal with this and fight.

Also can you give us some time lines of when this 5 year R happened and you have been a member here for a long time. if you could explain that.

Lets take a day or two and get you grounded ok.

Drink lots of water. Depression needs water.