We can never replace a friend. When a man is fortunate enough to have several, he finds they are all different. No one has a double in friendship.
Things happen to everybody in the course of a lifetime. Relationships end, people die, tragedy befalls everyone. So everyone has this wealth of experience, and the older you are the more you have to draw on.
Death is the end of a lifetime, not the end of a relationship.
When Tony was madly in love with me, his relationship with Vanessa Redgrave was ending.
Relationships end, but they don't end your life.
Every relationship ends, until maybe you find one that lasts forever.