I say this as someone who was in your shoes...and did the wrong thing...x10000. lol...

STOP thinking about her...and do NOT under any circumstances contact her. Respect her boundaries. She is not healthy for you. You fell for her, got burned, and now have to re-assemble yourself from that attachment.

You will only regret reaching out to her if you do. It will make you appear weak, and sooner or later, you WILL regret that weakness. It might seem like you're fighting for love or showing her you care, but in the end...she didn't want you. Respect that. Respect yourself.

Work on yourself...don't forget your mistakes...and she'll look back one day and regret things. Book it.