Positive emotions are really needed because these feelings cause that we meet a lot of interesting people, help us to be more brave and be open for others people or challenges.
But these negative feelings are the worst thing what can happen to you. When no one see how are you, you can get into trouble like depression or others illness your brain. You imagine that no one cares about you (what isn't true) and it could bring about dead.
It's important to have someone who can listen and understand you and when you happy make use of, it's the most beautiful feeling under the Sun.
You Only Live Once - Remember that and keep all of good memories.

