It's weird how often the ADD/ASD things overlap and I relate a lot but then sometimes they don't at all. I love hugs and I don't have any problem navigating social situations in person except that sometimes I talk too much and forget to give the other person a turn. 
I don't know if I have meltdowns as such but when I get really upset about something, all of my senses go "off" - my vision blacks out at the edges, hearing sounds as though I'm underwater, time/movement is slow, I'm really physically aware of my heartbeat, I often shake and I want to curl up into a ball and protect my stomach area. (My mum is into energy so I want to refer to this as the solar plexus but, yeah, in layman's terms it's the abdomen.)
But - I don't really have many friends. I have people that I would consider friends but then I realise that they're much closer to other people and I feel hurt, somehow. I haven't had a best friend since secondary school, we fell out and I wrote to her a few years ago, but she's not interested. I meant to post about this a while ago, actually. I find that I meet somebody, and I get on with them, and everything is great and I think that I've made a friend and of course, they'll have other friends who they are closer to, because they've known each other for longer or they have a shared interest or whatever, but then over time, I'll realise that they have met new people since meeting me, sometimes even people I've introduced them to (because for some reason I love introducing people, even though they end up stealing my friends 
) and I realise that they've been meeting up, calling/texting each other to chat and yet I'm still at the acquaintance level.
It's clear there's a step I'm missing somewhere, but I don't know where it is. It's probably that I don't tend to think to arrange things to do, combined with a really crap sense of how time passes, so weeks and months go by and I feel happy like I've just seen somebody, but for them weeks/months is ages since they have seen me, so they've moved on. I also don't invite people to my house. It's not embarrassingly messy any more, but it used to be for a long time, and I still stick to that fear that somebody might see and so I'm more used to avoiding people wanting to come over than to inviting them. Add to that that it's a bit awkward anyway, because it's so small so DS is awake if we have evening visitors, and DH can't really go off and do his own thing and he's introverted so he doesn't enjoy socialising with random people.
I enjoy talking/chatting on the phone, but I always feel really awkward about calling somebody, and have no idea what the etiquette is, whether it's okay just to phone on the off chance, or what to say to begin the conversation.
I suppose I want a step by step, broken down guide to how other people socialise, but I know that's a bit weird and probably most people don't really think about it and just do whatever feels right to them.
Bowwow - I dislike velvet but it doesn't trigger the same revulsion in me. Some fabrics are bad, anything which resembles tights is awful.