I suggest you to leave her immediately and stop all your interaction with her. Is she the only girl left in this world?
She is not even think about you. All the decisions are coming from her. When she want she start talking with you and stop talking with you.
Has she ever care about your emotions and feelings of heart? A girl who went physically twice in past and still want to maintain friendship with them looks very odd.
Your entire problem which you stated above clearly says that you have lost your identity. You have to think about your self-respect. Kick her out from your life.