Let me start this off by saying, you don't have to please everyone and make everyone happy. Other's happiness is not your responsibility. Do not drown yourself in trying so hard that you aren't even a happy person anymore.
With this in mind, if you can make someone else happy; do it. Often times, we claim we want to empower each other and make each other happy, but we tear each other down and are not happy for each other. We don't support those around us in what they want to do and what makes them happy. If we can make others happy, why shouldn't we?
Our happiness and opinions and beliefs do not have to be the same as anyone else's, but that doesn't mean we should shame them, hurt them, or make them feel any less.
We can be happy for others and their situations and life regardless if things may not be going as planned in our own lives. Being happy for others allows us to be happy as well.