Apologizing

Why is apologizing to people so hard for me? I really do think that I am a considerate person; I also feel that I put myself in others' shoes. I guess I just don't like being wrong. But i also don't like making a big deal out of things. I guess if someone wronged me I would want them to apologize, but I guess because people have done so much to me sans apology - I don't expect it - or plan to reciprocate the action........