Questions

At what point are we allowed to live our lives for ourselves? How old do we have to be before we can say because that's the way I want it, and not be tied down by everyone else's feelings? Is it even possible? Am I selfish? Has everyone on this earth been put here to live for others...for their entire life? Not being able to do this because it will hurt him. Can't do that, it might upset her. With any luck, I have at most about 20ish years left in this life. Will there ever come a time that I can do with it what I want? Can anyone answer this?