I agree with Dr Skipper on this.

The fact that you feel very guilty is good for you. You have a conscience, which is good! Let that good conscience guide you more often through life. That will lead you through less misery, guilt, and shame.

When a person repeatedly lies and steals, without remorse and believing that they did nothing wrong, that's when they need some help. Those people are highly resistant to treatment though.

Best wishes to you!