GREAT!
This is call friendship.
It's your birthday coming soon, I decided to plan a dinner or outing together. You got assignment, so cancelled the celebration 2 days before the meeting date. I was ultraly disappointed. Because I pre-planned of the place to go and stuffs in my mind..
Nevermind then.. You guys won't know if I'm disappointed or not, because I didn't tell anything.

There's more in my heart or mind... Shall keep them to myself.
Conclusion: I feel like all the things I did was taken for granted and not being appreciated. I may be sensitive, but I'm trying to be understanding and underdetermine the things I saw too. I hope it will be a strong underdetermination.