The people here generally tend to be a part of a group that shares a sexual fetish for being fat. They are turned on by fat guys and wish to be fat or fatter themselves. I think you are mistaken when you say, "It must be an easy way to be happy with yourself." The people here, who call themselves 'gainers', did not simply give up losing weight to take the easy road to being happy. Some have taken the hard road and have struggled to be your size from a skinny or average weight. Gainers also have to fight social stigmas, health, and family issues to be 'happy' so I wouldn't call that easy either.
In any case, you are among friends even if you don't share our 'gaining' mindset. Most in the community tend to be gay as well. There is a website called biggercity.com that caters more to the fat acceptance crowd rather than the gaining crowd.