How sad we are to think that another person causes our own feelings in any way. It is our love for others which gives us pain. It is our wish that they do well, that is what causes our grief, if they do not do well, we hurt.
There is also the pain of separation, our wishes and expectations are broken with separation. So often, separation is unfair or unjust. The universe does not care if we agree. The universe simply keeps on moving in an endless dance with both life and death.
Disappointment, separation, death of a loved one, these are all things which come to us at least once in our lives. Our suffering does not change the world, or make the universe different, it is simply our suffering.
As human beings fully engaged in living and loving; we must pay the prices of disappointment, grief and pain. These are the currency of loving deeply and vividly. At one time our heart was filled with intense joy and passion, that time comes and then it goes, yet, it will come again.