When you hear the word "repentance" what do you think of?I would venture to say you don't think of your mind, but the word actually means "to change the way you think."
You can't change your behavior for the long term without changing the way you think. If you are not satisfied with your life, the key to changing it is changing your beliefs.
Romans 12:2 says, "be transformed by the renewing of your mind."
It's not hard to obey God when your mind is renewed, but it's impossible if it isn't.
Ask God to expose the lies in your life, to change your thinking and that will set you free!