Why did she pretend to forgive me?

Anonymous
I did something to my now ex girlfriend, since she has disappeared on me and blocked me on everything, that I have done to her one too many times and each time I regret it and I apologize and hope for her to forgive me and she does. She forgave me once again and after forgiving me we spent the day together. We watched movies, laughed and talked together and she even stayed the night. It seemed like she was gonna give me a chance to make things right but the next morning when she got up to leave for work and asked me to walk her to the train, she doesn’t drive and she typically take Lyft’s or Uber’s but her job isn’t far from where I live so she decided to get on public transportation, I walked her. I kissed her and told her that I loved her. She said it back and I asked her just to confirm “You’re not upset at me anymore right? You’re giving me another chance?” And she told me yes and I told her to text me once she made it to work but after a hour went by and I didn’t hear from her, I decided to call her but my texts weren’t going through. I called her and it went straight to voicemail, something told me she blocked me and at that point I was confused. I called her unknown (privately) multiple times she ignored every call as if she knew it was me. It’s been three days and I know I’m still blocked because she hasn’t contacted me back. I know what I did was wrong and I hurt her but she didn’t have to pretend as if she forgave me when she knew she didn’t all along.
Why did she pretend to forgive me?
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