If someone is happy with who and how they are, then what is YOUR problem exactly?

By that I mean, if what they are doing or who they are does not negatively effect anyone else in any way, shape, or form that is. Then what is the problem? If someone wants to be with the same gender and live happily ever after, what concern is it of yours? And before you become all snooty and authoritive with me about how GOD HAS A PROBLEM WITH IT, please show me evidence that he does? If he exist that is...and if he does have a problem with it then why do so many gay friendly countries, states, towns, cities, etc. live for the most part...peacfully and prosper?