Human beings are dramatic, period.
Such is life.
OP: This is not in any shape or form a sling to you but more of something that is personal to me and only me. So, don't take this post below as me being PA or somehow underwriting you. If anything, I only speak in terms of my own personal experience and a very recent one, to add. :/ So apologies if you're getting the shit end of this.
Personally, I have no life right now outside of being on the computer but hey, I freely admit.
I also admit the fact that I hate when someone drops the ball and doesn't respond or have the decency to notify their lack of interest or send a quick text saying, "Sorry, can't make it like I thought. Explain later. "
It sucks that things don't go through. :/ Sucks even more when a person can't follow through. Takes less than 10 willful seconds to inform a person that something is or is not going to happen. If a person can go drink some water, pee, wank, they could certainly be responsible enough to say, "Hey, can't make it." Tell me what, and if possible, why. If you don't, I'm not really going to take the said person than anything more but a whimsical flake who visits, optionally. It's lackadaisical and carefree, quite frankly makes me believe a person doesn't seem to care.
Don't get me wrong: Intentions DO matter-- even if a person really WANTS to visit me-- but it isn't enough. Either a person can visit or they cannot. If one cannot, say you cannot. Don't leave a person guessing the day of.
Communication is easier these days yet people still people drop the ball. -_- I just believe though that unless it's a crisis or something, a person should be able to reply back especially when they are at leisure and are not preoccupied. In your situation with friends, I, personally, would understand so long as you told me you were still up for our said planned get together OR not. I'd like to know before the day of unless tragedy/calamity strikes-- and there are times which it does.
I guess I've too much of the other kind of crap, of being stood up so I'm kinda hardball about it now. I've always been a bit of a planner, even if I am free and have absolutely NOTHING better to do than to stare at the wall, literally. I still like to know beforehand if something is or is not happening. I'm flexible, and lenient but to a point. I need to know what's happening so I can prep.
Those are just my thoughts though. :3