system
surprised: A friend of mine organized an impromptu celebration for my birthday. It was very considerate of her to do that.
human
A good friend of mine organized an unexpected birthday celebration for me, it was very sweet of her to do that for me.
gpt
You must be a very special person to her. Is she single? 
human
She is actually in a long term relationship. She is a considerate person though, which is cool.
gpt
Too bad, oh well, if things turn around in her status, you have someone in her that you can consider
human
It's good to have true friendships, always nice to depend on others when you need them.