I'm too busy working on my own grass to notice if yours is greener. As far as I'm concerned, MY grass is greenest. Makes for a content life, and I like it that way! No keeping up with the Joneses' allowed in my house!
Remember not to blame feelings on others. Happiness is a choice so choose to be happy! Surround yourself with people who choose to be happy not because someone is making them happy or because things are going their way; that is not true happiness.