my analogy goes something like this. if someone you love only had a number of days left to live (say, family) because of a terminal disease, will you just withdraw, move on, para di ka mahirapan? No. Wouldn't you want to spend as much time as you can with him or her and just simply appreciate those moments?
For what it's worth, I wouldn't be able to leave anyway. Because for all the differences and the disappointments, and the good in himself that he might not even realize, it all just works out. He's enough.