Just Try, Again and Again by Sara Amanda

Bryce Simmons is the man women dream about—handsome, kind, and successful, with a heart that beats for his found family. But beneath his perfect exterior lies a perplexing enigma.–
Bryce is married, but not in any conventional sense. For years, his wife, Haruki, has been a phantom, a ghost he has encountered only a handful of times. Once, they believed they were twin flames, destined for eternal happiness. Yet fate played a cruel game, repeatedly tearing them apart whenever they inched closer to their happily ever after.
Just as Bryce has about given up on Haruki, she reappears on his doorstep. Their past is a labyrinth of heartbreak and missed chances. Now, with the shadows of their history lingering, the question remains: will Bryce and Haruki surrender to the relentless forces pulling them apart, or will they fight for their once-in-a-lifetime connection?

This is not a story of second chances. How could it be when they never even had one?