Can you be happy and energetic if those around you aren't? If your friends or your mate are sulking or hurting about something is it selfish of you to maintain a peacefulness that doesn't allow their mood to affect yours? I think as humans we want to be so empathetic towards our loved ones that we embrace their pain. And while to an extent that is self sacrificing, it can also prove to be unhealthy. In order to help others you have to be centered within and have the ability to maintain your mood. You can be supportive and loving and at the same time set boundaries for yourself. You will be happy even if your mate is in "a mood." You can continue to feel joyful even if a friend is going through difficulties. Help that friend, talk to them, love them and continue to feel your joy. Your joy will likely rub off on them. I believe we take many years off of our lives when we create stress in environments where they aren't there; when you allow someone else's crisis to become yours. Remain in your positive emotional space and be that inspiration to someone....