Time, subjective or objective?

Time as we know it in our society is considered as a thing we mostly agree, we don't argue about what time it is. Yet we claim that time flies when we are having fun. There is a reason for me starting like this. Some are very relaxed about time and arriving places. That is not me. As I previously have mentioned, intense planning is a strategy I've turned to for reducing my social anxiety. As a rational human being, I know it's more or less counterproductive. Planning when I need to go to the bus, which bus I need to take, which route from the bus to the place I'm going to, it all reduces my stress and anxiety right after I've done the whole thing. It doesn't calm me over a long period of time, though.

Every day untill the event the anxiety comes back, more or less on the same level. Relaxing can finally be done when I'm at the event.
What I'm most scared of is getting late and therefore I plan there after. The result is obvious: I'm always the first guest to arrive, usually ridiculously early. As embarrasing and shameful this might be, it's still less embarrasing than if I were to be late.

Both in my regular sessions and group sessions I've been asked what about everybody else who do arrive late and don't seem to care. My rules for myself don't apply to everybody else as they are not me. I don't get mad, just frustrated at them. I do get angry at myself, if I'm late for once or if I let myself be pushed around by my anxiety. It's the famous Catch 22.

I can somewhat deal with the anxiety when I'm travelling to and from places on a routine basis, like to and from work, for example. As long as I do everything at predetermined times, it is ok. Stress peaks if I'm delayed, though, so I rather not do that. Same thing if I'm with other people who don't understand my need to be early and plan ahead. I can feel the anxiety trying to create the sentences, as a matter of fact.

As a closure, I have some advice or tips for anyone who is a friend of someone like me. Please try to understand. And if not understand, respect that we're different. I also would like to say that being impulsive and slow when heading out, is a nightmare. So if you are one who takes some time to get ready, that's okay. Don't get stressed because we decided to get ready too late. I'm very easily stressed when other people are stressed.