The flags I see are that you never fought and that she's gone.
I think the only two people in the world that would never fight are enlightened beings. The rest of us do regardless of the depth of love.
And that she's gone to me screams that something was missing where she didn't depend on you emotionally enough to cling (which would create the fights not to mention the gender differences are a constant source of misunderstanding) and didn't love you enough to stay and figure it all out.
And none of this is under anyone's control. By nature, to me something is missing and it wasn't a strong enough match to turn into a journey to self through a journey of love.
This is my guess. A deep harmony and the love that follows it to me is the only real "marriage" in life. All one can do is let go and what is real remains and what was false vanishes.