Don't take it too seriously. Sounds like she might have been having a bad day and took it out on one of your obvious faults, or tics.
You realize that you are often late to things, and truthfully, that's rude. It says to another person that your time is more important than there time.
Try to fix this. If you can't do it, maybe your time is more important than someone elses. Making you rude.
But she has known this about you since school, and still is your friend, so she must like you. She just called you out on a flaw in your character.
Take it to heart and start being on time.
But if you don't, don't cry about it.

Alex,

I am the same way!

I allow a half hour travel time or less and I am ALWAYS late.

Screw your friend for being so superior and elitist!

OK, I’m confused. Is Lindy Monica or did you actually set an appointment to meet Monica at 6:30 and you were early for that one and late for Lindy at 6:00…..enough of that already! Late is late. Why be on time with the clients and late with friends…..priorities? That sums it up!

the guy i've been seeing for several months now is always late. I swear, the only time he ever showed up on time was on our first date.
now, months later, it's really irritating.
we meet up- he's late.
we agree he'll phone- 2-3 hours late.
it's becoming a big problem, because it seems like to him my time is completely un-important.
so, what i'm saying is it really sucks being on the receiving end of this. plan ahead. you're not that important that the world should always wait for you.

So you really want to know what some say about it?

Many psychologists suggest that chronic lateness has to do with control issues, passive agressive behavior and a general disregard for other people's feelings and time. These people also suggest that only you know what it is all about for you. What I do in these situations is to just go within and ask and be willing to see the ugly parts of myself. First question would be..eeuww..why didn't I call? Then just really see.

And, hey..hard thing to do. Good luck and be gentle with yourself if you decide to go there. And if not..hey..I just keep reminding myself that the word human is just another word for fuck-up. People need to lighten up around each other.

It's called being 'fashionably late'..

But the real question is: If you come to Los Angeles to visit, can all of us here visit with you?

Promptness is a sign of respect, it shows you value the time of others. Itss also classy and kind of sexy in a women. Right now your being late for friends and not for clients almost implies that you value the client more, might want to think about that.

All that being said, its not something that can't be changed. Habits can be broken.

Passive Aggressive.

You didn't mean to, you just didn't care enough not to.

I know people like you. If you really, really cared, you'd get there on time. She's told you before that this hurts her, I'm sure. This is all about you, but it's not some weird wanting-to-piss-her-off thing, it's just you being an arsehole.

You were and have been late as a habit, and it is passive aggressive. But, is this the first time she's mentioned it? It's not fair to you (or her) for her to wait until she's boiling over to address an issue that obviously has been upsetting her for years. And late to her wedding? That's probably what she's really mad about. On time for yoga and late to her wedding is sure to hurt some feelings. Too bad it ruined your visit.

Sorry Alexa,
While I sure her outburst was precipitated by something else, her complaint is valid. You can only be fashionably late to a large gathering with no firm start time. One on one - it's just rude and self indulgent.

But we still love you.

Sometimes people are late. It happens, it didnt kill her. Shes still alive. She should have been nicer to you. Theres no reason for treating you like that, especially over 20 minutes.

I have a few friends who are always late. While I forgive 5-10 minutes, any more - or more than twice in a row - is not about having to sit there. It shows that the person doesn't respect your time and therefore doesn't respect you. When you agree to meet someone, you make a commitment. They could be doing something else, so if you're not willing to stick you the deal, free her to see someone better with her limited time.

And don't just walk in and say 'hi!'. Apoligise immediately and acknowledge that you were late.

Being late is in poor taste. It's rude, selfish, and inconsiderate. It does sound like Monica has been storing up some angst, and she should have conveyed it to you sooner rather than attacking, but on the whole, it does sound like you've earned it. Late to her wedding, for crying out loud? What do you have against this girl?

Gillette mentioned control issues, but if that's your hangup, you can demonstrate just as much power and control by being precisely on time - it takes a lot of skill, believe me.

Hey, I'm in the same boat, although I've improved the work bit to being near "precisely on time" or only a couple of mins, vs. 20. It's really not so much a passive-aggressive or rude issue most of the time, but simply that there are some of us who are more comfortable on an "ish" timeframe when we're not actually on the clock or have to make a plane. That's why my real friends know 6:00pm really means 6ish.

That's what cell phones are for...at least call and say you're on your way. If there's not set plans with a time fram involved (ie, Bway show time), no biggie.

Hi, Well i have to atmit i know excakly how your friend feels, no i dont think you do this on purpos, But its still sometimes hard to belive that somebody that cears about you has so little respect for you and your time that they dont cear if they keep you wating around for them. And im sorry my friend, i have to say i dont agree with "everybody is always late" sounds to me like you take your friends for granted, with out relising it. you said it your self, you are never late to things that will have consequence if you dont show up on time. for me i to know my friends cear about me they need to show me respect, i dont feel they show me respect if they keep me waiting around for them. sorry not good at the kiss ass answers, if you ask my opinon i give you what i think, but ofcours it does not mean im right :)