This quote is referring to the feeling of an obligation to care for and please other people, and the anxiety or guilt experienced when they are unable to do so. This feeling is shared by the character in the movie ‘Truman’, and the person speaking. This feeling has been present ever since the speaker’s success began. In other words, the speaker has a strong dedication to make others happy, and feels bad if they cannot provide that for them, and this feeling has been with them since their success started.