Is yours an honest lament?...Most are not, you know. Most self-imposed burdens are founded on misperceptions. We - at least we of sincere character - always judge ourselves by stricter standards than we expect others to abide by. It is a curse, I suppose, or a blessing, depending on how one views it... Take it as a blessing, my friend, an inner calling that forces you to strive to unattainable heights.
It is better, I think, to grab at the stars than to sit flustered because you know you cannot reach them... At least he who reaches will get a good stretch, a good view, and perhaps even a low-hanging apple for his efforts.
Guilt resembles a sword with two edges. On the one hand, it cuts for Justice, imposing practical morality upon those who fear it. But there is another side to that weighted emotion. Conscience does not always adhere to rational judgment. Guilt is always a self-imposed burden, but it is not always rightly imposed.