Is NOT wanting to get married bad?

I am currently 30 and not quite sure if I want to get married. Personally I feel people marry for mostly financial reasons. I don't see much difference between marriage and a normal relationship. People say when you marry some one it shows you're fully committed to them. But in marriage people cheat all the time, sometimes without their spouse ever finding out. I prefer to just date around and focus on myself for now. My mind might change later on.