There's an afterword in Bomtoon which says that the ghost had to undergo additional treatment for 3 years since he was in a coma for 8 years. That's why they couldn't meet sooner. So the ending shown actually happens 3 years after they part.
She's a good love coach, although her advices might be a bit too cheesy. Hahaha. I feel like without her, Li Huan won't know what to do to win Yu Yang over.