Practice abundance. Open a girl and escalate, but remain unattached to the idea of closing. Walk away. You extracted the use out of her in that moment you wanted and now her novelty ceases to amuse.
Don't simply do this because it's a strategy that can work. Do this as a matter of course.
Your emotions are yours, and the universe starts and ends with you. She may be a part, but you don't need her to make your universe one of abundance. Don't just fake being the alpha she wants, BE the alpha she wants.