Your absence of self-esteem probably comes from the attitudes of other people towards you. Your parents, brothers and sisters, etc. are all contributors of how your self-esteem is formed during your early years. If you come from a loving and caring family, have lots of friends and you did well at school your self-esteem will most likely be at a great level. On the other hand if you have only encountered negativity throughout your formative years your self-worth is very likely to be very low.