When you meet new people, do you ever just irrationally HATE them?

This is a little embarrassing to admit, but here goes:
A few weeks ago, I locked my bike up outside this juice bar in Portland, a tight ball of nausea in the bottom of my stomach.
I was at WDS – the conference World Domination Summit, where do-gooders (like me) try and make the world a better place – and arriving at my first ‘meet-up’. These are impromptu gatherings thrown by attendees. I had my own one the following day, a short workshop on How To Tell Compelling Stories. But this one at the juice bar was a storytelling meet-up being thrown by someone else – a lady I’d never met before, and was a bit scared of.
Two days before, I’d (finally, very last-minute) decided to put on my own meet-up about storytelling. As I scrolled through those other people had posted, I realised that there was already one happening on the same subject. Gutted at first, I then looked into the details and decided it was ok for both to exist. This one, by a lady called Sara Hunt, was going to be about how to figure out which of your own stories to tell. Mine was more about how to tell your stories. Also, hers was already full, so I figured it was even more ok to put mine on.
But I am a perennial people pleaser, and I was still worried that she’d be annoyed. So I sent her an email.
In it, I explained what I felt the differences were between our two workshops, and told her I’d love to meet her at some point – which was true; from her website and blog, she seemed cool and interesting. Then, I asked whether, if there ended up being a free spot, I could come along to her meet-up.
It took me about 20 minutes of writing and rewriting to compose this last question.
What if she thought I was just coming along to steal her ideas? What if she was annoyed that I was running my own storytelling meet-up and it made her not like me?
My fears were trumped by how much I wanted to go, so I asked. To my relief, I got a reply saying she’d love to have me along.
But now, I was actually here…