No one owns anything. Anyone who has lost something they thought was theirs forever finally comes to realize that nothing really belongs to them. And if nothing belongs to me, then there's no point wasting my time looking after things that aren't mine.
Certainly. But take this into consideration: of every ten problems we have, nine are created by our own selves - through guilt, self-punishment, self-pity. However, from time to time a great obstacle appears in our path, which was put there by God, and which is there for a reason. The reason is: to give us the opportunity to change everything, to move forwards.
Because we managed to keep our heart open, despite the pain. Because we realized that the person who left us did not take the sun with them or leave darkness in their place.