At face value, she's regretting a little, but who knows for real right? I'm sure you can feel her 'sorry-ness' by the way she speaks to you. Sounds cruel, but leave her feeling sorry for longer to make sure that she GETS the message that she shouldn't always be so egoistic and push you around. This makes you look like you've taken a stand. Thus, it's sorta 'masculine' from what I've heard and in some funny way, she, being a girl, will respect that. This is how it increases your value in her eyes.
Also, as I've said, limiting your affection/attention/care gives them a greater perceived value. She'll feel it don't worry. Just think it this way, when someone rarely shows you affection, does it feel as if it's more valuable when that person gives affection to you? It does right.. That's the psychological example. However, bear in mind that this is a mind game. As discussed in one of the post in this forum, people have many different stands on playing 'games' with their partner. Generally, it goes like the example that I've mentioned, like intentionally limiting certain actions to make your partner crave. All well and good for a lil spice and some poking fun, but from my perspective, playing games in the long run isn't what I WOULD LIKE to do. In a long term relationship, I'd like to be as originally myself as possible. But that's me.
Back to your topic, I'm sure you get the idea of 'increasing' your own value in her eyes. One more thing to note. Don't worry so much about what SHE sees in you. You're looking for her validation. More importantly, what do YOU see in yourself? Do not be so dependent on HER validation of your worth, rather, build your self esteem to a level where you feel comfortable being yourself etc. With this, your confidence will naturally come, and well, you wouldn't care so much about how valuable you are through her eyes because you KNOW you're valuable yourself and that's really more important. Who's gonna stick around YOU longer? Her OR yourself?