@KINGwaldo she was choice number 2, he was truly in love with the other girl, his feelings for both girls did not changed does not matter if it was his past life or present, and he is not the type to have a harem, i feel like he is loyal and only wish to have one partner.
If he said the truth:
"You was my wife, but only because the woman i loved died, she still alive so...."
Feeling: Awkward, weird and wrong
if he said a lie:
"You was my wife"
It would be a relationship created based on a lie, he would feel guilty, the truth would appear someday, that she is not the woman he truly loves, both would be heart broken and the girl he loves could probably end up with his best friend, mega Awkward.
So he said the truth from before his true love died, i think that was the best choice.