Apologize with confidence when necessary. It's something many people don't do because of stubborness, ego, and the likes. But apologize when it is truly needed, when you know you are wrong.

When I say apologize, don't do it in a pussy, needy sort of way where you say you're sorry and you love her and shit and that you'd do anything for her. No. Apologize with dignity, keep up the respect, admit you're wrong, say it won't happen again, sincerely, and then move on. You will see how much she will appreciate your honesty, your self-awarenes, your dignity, and she will have respect for you again. Because remember, you can fuck up, as long as you make it right in the right way again.