When you are sad it means you are out of alignment. You can't find balance. Things that should make you happy no longer do. There are people around you who love you, but you can't feel their love. They can't help you. The only person that can help you is you. You need to find your way back to your balance.
Being sad is one thing and looking for happiness is another. Sadness can be a state that you can treat as permanent or you can look at it as a temporary state in which there is a way out. Your response to your current state of mind has a great significance in the speed at which you can get out of this unwanted state of mind.