I have a question for you. You've admitted to us that you are still hurting. That you're angry. You also said "it would be a blatant lie to tell her I'm fine".

My question to you is this: Why do you care about her knowing you're not fine? Why can't she ever find out that you're hurt and angry. As long as what she thinks still matters to you...you are powerless to move on. Not that you should disrespect her or treat her bad. Just stay away from her, and when you meet by chance and she says "how are you?"...well, "I'm still upset over how things went down...see you around."

Sooner or later, you'll notice it gets really easy to tell her goodbye.

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Though I am different from you,
We were born involved in one another.

For it was not into my ear you whispered, but into my heart. It was not my lips you kissed, but my soul.

Complete surrender should not just come at moments in which one faces overwhelming odds, but in the calm when it seems one is personally in complete control of one's life.