Do I tell my dad about AS?

The first thing I did when I got my official diagnosis was to call my mother and tell her. She has had some mental problems herself so she can sympathize to some degree. She's often helping me with my welfare, meetings, doctors etc and she's happy to be included as long as I make an effort to be more independent.

My mother told my dad, and he didn't really know what it was. When he got some info on AS and a list of possible symptoms he said "If I read this five years ago I could've diagnosed you then", which really surprised me. He always tried to force me out of my room and threw my pc out at one point. He had big issues understanding my depression and difficulties, but now he's very supporting and he's very happy when I include him in my affairs and tell him how I'm doing.

I didn't like the response I got from my sister. All she said was "But you're not nearly as bad as my friend with AS, you don't seem to have problems at all." It made me feel like my AS wasn't important, because I can function well compared to some people with AS/autism. Compared to NT's I don't function very well at all.

All in all, I'm glad I told them. It's made my battle against my welfare office and other stuff much easier, and it's nice to have someone I trust with me to certain meetings as I have big issues processing all the information they throw at me.

I told my dad and had no reply from him at all.

I first thought no real loss here. Until last weekend he contacted me asking to meet up and talk about this.

He said that he does not think I am autistic and have no real problems as everyone is different and I am just me. I said that its just a word for my personality and he accepted that.

I also explained about my past, things like he took me to a firework show where I had an "episode", why I never laugh at his jokes and other things...

He accepted I have aspergers

What I mean by episode is a break down, where you either start swaying, or getting violent.

What happened to me was I went and laid on the floor, screamed and held my ears.

Ogr that sounds almost identical to how my brother (who is 9 years older than I am) reacted. At first he dismissed it, then later he wanted to talk about it and said he couldn't see it, until I explained certain things and reminded him of a few things in my past (like no friends, not knowing how to be empathetic, etc), and then he accepted it.
Most people need time to process new and unexpected or surprising news. They may have varying initial reactions but then after they think about it they can be reasonable about it.
Glad it ended up working out for you telling your dad