Yes there was a specific incident that triggered his behaviour. I didn't include it in my story as the story was long enough as it was.
This is what triggered his reaction: we had dinner at the Noodle station at Tomorrowland Terrace. When finished eating, my son hadn't finished his drink. I told him to take it along, but he didn't want to. We had a short discussion about it (in a calm way), and then I figured he might not want to take it as the disposable cup had a castle print on it and he wouldn't want to be seen with that,

so I suggested that I would take the cup with me and I would give it to him whenever he would be thirsty. While saying that, he crushed the cup and there was nothing else to do than throw it away. I told him I didn't like that he did that, after all the cup was still half full. All this time I kept my calm.
Probably all this wouldn't have happened if I hadn't made an issue out of that cup and had just let him throw it away. It really wasn't worth the spilt dollar. But I want both my kids to be aware of the value of things, and not just to spill food like that.
As he couldn't be calmed down and I decided to leave the park, that also put oil on the fire. As he loves the Extra Magic Hours, and it was the only time we ever were there Magic Kingdom was open until 3am!!! If we left he would miss that. I'm not sure if he thought about that at the time, but that might have topped it and caused this reaction.
When I try to talk to him about the reason why he doesn't like to be around his sister and me, his explanation is that it's not cool at his age to hang out with his mother and sister. But maybe there's underlying reason that I don't see. Talking about his dad, his dad doesn't indeed accept his diagnosis, moreover, I'm pretty sure his dad has ASD as well (never noticed it until our son got diagnosed). I don't see how that would explain why our son wouldn't want to be around females in public, though?
Thanks for suggestion reading Temple Grandin's books. I know who she is but I never read anything she wrote. I did read some books of Peter Vermeulen, which is an expert on autism here in Belgium. They're in Dutch (my native language), but some of his books got translated into English, and several other languages as well.
It would be a good idea to read something about anxiety, specifically, to get more insight on this.
Now, I was just thinking yesterday night... It's a big step for him to go to WDW again, and for me and his sister to take him there again, but I'm so anxious to go to WDW again myself, that I didn't even think of another solution: we could go to
Disneyland Paris for one or two days as a "trial". It's just a 4 hour drive from where we live.
I will try to get some more insight on his anxieties, and talk to this therapist about it, and hopefully he would be willing to come with us to Disneyland Paris and maybe even next year to WDW again
Thanks
