A Cryptogram

A young lady was supposed to go out to lunch with her friend. She waited for about an hour or so but her friend did not show up at her house. She then proceeded to pin the following note on her front door for her friend to see and went to eat lunch alone.



How does this message read? Here are a few hints to help you: 1) "G a" express a little message in French, 2) the numbers express how she feels in English, and 3) "PS." is a reference to her name.

Despite these hints this cryptogram is very difficult. However, it is clever and interesting. Enjoy.