clearly, this scene was shown, directed by the author

as this is what he really wanted to do

if time rewinds

because he knows, he regretted walking away from her

never go back in time

not being at there with her, to wipe away her tears although in his heart, he truly does

Years later, the girl is already married to somebody else

the only thing he can do

is nothing but just placing her at the bottom of his heart

& give them his blessings

He knows, he won't love any girl that much, like what he did to her any more.