I rarely get depressed, and it is because I easily let things go. I value my mental sanity over most things in life. Most people get depressed because they are holding onto people and things that are no longer serving their purposes. It is time to let go. Life is too ephemeral to be worrying over another person's thoughts, actions, or perception of you.
This is so true. We need to learn to let things go. We need to let go of the things we cannot change.