Someone who professes to friendship falls in love with an idea you offer them about an activity to do together on the one short chance you get to see that person. That person then plans to partake of your hospitality but so alters the activity that you are excluded from it either through failure to think of you at all or failure to be considerate in the slightest about the guest list, or both.
I know it probably wasn't meant to be cruel. I know said person probably just failed entirely to comprehend very overt information that some third party's were not welcome in my life, and in wanting to see them zirself, failed to even think about the message it sends or exclusion and taking advantage it creates. But what I want to do is give in to the desire to retract my offer of courtesy if that is the treatment of friendship to parties involved. *sigh*
I am being stupid and pissy, probably, but there you have it.