She never forgets what he told her: "if you don't want to lose me, you must be good with me". And she really loves him. He knows the secret of success with women isn't how you behave, if you are what women want.
Your bully said he would leave you alone if your girlfriend went to the movies with him. You were worried but she assured you that she loved you too much for anything to happen. Guess she found something she liked more.
Even though you'd only slept together once, your girlfriend felt sorry enough for you to agree to sleep with your boss to save your job. It was a little jarring to hear her say she loves him after, since she hadn't even said that to you yet