Less traveled.

Early to rise or sleep in

She's manipulating and immature. That doesn't make her a bad person, but a selfish one.
We've all been in your shoes. Time helps and meeting someone else for a casual relationship helps occupy your mind and body, but you have to respect yourself more that when you say, "no," mean it and stand by it. Close any doors and move on. Play devils advocate with yourself by playing out the scenarios in your head if you break your word.
"I let her back in, THEN WHAT?
She screws me over again. THEN WHAT?
I hurt again.
I say no, again. Rinse, repeat."
Sorry for your pain. Hope you get some closure soon. xx

If I had to pick a favorite, it would probably be "High Anxiety".

Or "Blazing Saddles"...

Or "History of the World Part I"...

You can tell a lot about a person by the type of movies they like, particularly comedy style. Anyone else appreciate the sarcastic, dry wit humor of Mel Brooks and friends? :)