Well this was a waste of time, every editor should tell an author if they simply want to end any given romance with "timeskip-->they randomly find each other--> implied spending more time together handholding", then they simply shouldn't bother, is so overplayed.
You might say "but she is too young and he is too old for them to do anything", then pick another plot, the author is god, any contrivance is a consequence of his or her choices. 4 years.