You are what you want. If you want to change who you are, then you will have to want something radically different. Your destination, your desire decides your constitution. You become what you intend to achieve and be.
If you love the mud, you will become an earthworm. If you love the sky, you will grow wings. Your entire personality will—that’s what you want, right? The entire personality must come apart. Then you have to change what you love.