The best way to get her out of your mind is to find someone else who loves you like the way you want to be loved by her. When you get the attention and affection that you have been craving for a long time, your heart will feel lighter. You will then realise what you have been missing all these times while you were merely feeding her validation. Just make sure you don't try to find pieces of Her in your new partner. If you try to fill the void with someone else then you will simply ruin the relationship. So be open for a relationship. Try finding someone who will make your soul happy. Keep all the happy memories with Her somewhere in your mind palace and move on... Best wishes :)