I don't understand

I am almost tempted not to be friends with someone because this one thing about them drives me nuts. We have only been friends for a short time so if the friendship was lost as a result of this I wouldn't be sad. Come to think of it if I based all my friendships off of this one thing that enrages me then I would probably have no friends at all. For example this habitual late "friend" of mine is a complete absent-minded idiot. I know I shouldn't speak of a "friend" this way but good lord. I've tried to be patient because patience is something that I've been working on for the better part of my life. But she tries my patience to no end with her habitual tardiness. We were supposed to meet for lunch one day and where we were meeting for lunch was three minutes from her house. We decided to meet in 30 minutes. The time on the clock was 1230pm. So 30 minutes from 1230pm is 1pm. I was there before 1pm and was having a friendly chat on my phone with a friend. 1pm came and went and when my "friend" showed up 20 minutes later I asked what happened. She said to me I thought you were going to call me when you were on the way. Why the fuck would I call you when I was on the way when at 1230pm we decided to meet in 30 minutes. There needs to be no further discussion about it and I certainly shouldn't have to call you. Her saving grace was that my phone call distracted me long enough for me not to realize that 20 minutes had passed before she came. To some and to this particular friend they can't understand what the big deal is but to me it is everything. The one thing in this world that drives me absolutely FUCKING CRAZY is people being LATE! I am generally a very laid back chill individual but this pet peeve of mine will have me up in arms. I could go on all day about stories of people being LATE but I won't then again as I write the stories are coming so I'll share a few. I don't understand why it is so hard for people to be on time. The only time I will ever be understanding of an individual being late is if??? Well come to think of it I am rarely understanding of a person being LATE. On the other hand my friends and family can't understand why I am on time most if not all the time. If I say I'll be somewhere in 20 minutes I will be there in 20 minutes or less. If I say I am going to take an hour I will be an hour or less. If you tell me that you are going to be meet me somewhere at a certain time I expect that you will be there at that certain time as well. If you are LATE then I will be extremely pissed and secretly hating you and if you are extremely LATE it is very likely that I will leave and cancel on you. I will give a grace period of about ten minutes before I either call and cuss you out or just leave. In that ten minutes if you don't call and say that you are very close to coming then it is very likely that I will say never mind and don't come. What enrages me even more about a person being LATE is if you are LATE because you are FUCKING AROUND. And what I mean by FUCKING AROUND is doing absolutely nothing when you should be getting ready to meet me ON TIME! If you are sitting around your house being lazy and stupid and that causes you to be LATE then that will cause me to be pissed off. Or suddenly you realized you had to things to do and you had to do them before you come to meet me. What the Fuck! When I give a time I account for traffic, getting ready, or if I have other errands to run. You should do the same. It is common courtesy to be on time. But to be late just to be LATE is aggravating. The worst offenders of this are black people. Whoever invented C.P. time needs to be shot. As a black person myself I find it to be a piss poor excuse to not be on time. Case in point is the holidays and family gatherings. When it is decided that dinner is going to be at 2pm it is a good chance we aren't eating till 3pm or maybe even 4pm. Another time my cousin and good friend who were LATE meeting me out one night. They begged and pleaded that I come and meet them for an evening out. I arrived at the destination and they weren't there yet. I called and ask where are you and why aren't you here. They said they would be there shortly and I said elaborate on shortly. I gave them about ten more minutes after that phone call and still they were a no show. I called again and they said they would be there in five minutes. At this point I had allowed for 20 minutes of tardiness. Completely uncharacteristic of me to wait that long for anyone. In the middle of that conversation I said forget it and left. The reason they gave for being LATE was they were drinking and getting ready and had to stop at a Walgreen’s. It goes back to my point earlier. You didn't have anything to do all day and when it came time to meet me you suddenly remembered that there was something to do. I don't care what color you are be ON TIME! It is not hard. If I can do it then you can do it. I have shit to do most days but I make a pointed effort to extend the courtesy of being on time and should I be LATE for whatever reason I give a courtesy call. Which brings me to those of you who know you are LATE and when I call you don't bother to pick up the phone because you know you are LATE and don't want to hear from me. Save yourself and me the headache of making that phone call by being ON TIME.