Really sad that I can't be as spontaneous as I was before T1D. Have I said this already?
Yes, you have, Sue, and the answer is that, give it a bit of time, you'll get used to it, it'll eventually be second nature to just pat your pockets down to check your pen, meter, glucotabs are there, and then sally forth into the big wide world.
As time goes by, you'll figure out ways of dealing with these sort of situations - going out to meet a friend, you'll maybe have a general idea of where you're going, what the general service time is there, and the likely carb count of what you'll be eating, so you can then start thinking about whether a few units beforehand to get some in stream will work before you hit the carbs without putting you in hypo territory if the service is too slow.
I've been caught out a few times in those sort of situations, happens to us all, but I always try to remember a quote from Elliot P Joslin, who was at the forefront of T1 management last century.
He said that T1s were extremely good at figuring out answers to difficult situations. He was one of the first people to decide that it was right to hand over day to day management decisions to the patient instead of the doctor.
It takes time, but give it another year or two, and I'm guessing your take on it will not be, "I can't do that", it'll be, "here's how I do it."
You'll suss this out.
https://en.m.wikipedia.org/wiki/Elliott_P._Joslin