relationship advice

it's the first time i'm using this thing, but i kinda need the objective opinion of total strangers. premising I'm a baby adult and have high-functioning autism.
so, I've been texting and meeting up with this guy, he's great and genuinely a nice person so i have no worries about that; I've known him for about a year and this 'situation' started last december, and i realized i actually started liking him at the beginning of this month - it's quite rare for me to start caring for someone -.
I noticed i started getting quite anxious about this, although now I'm coping with these attachments issues as well as I'm able to. I'm slow at these things, but I'm assuming that if someone who explicitly told you isn't affectionate acts affectionate towards you, including body language, it might be a sign he's manifesting an interest? like, he's caring, we can openly talk but i think he's maybe attentive towards me and doesn't go beyond the boundaries, but we also went on dates, night dates, held hands, made out and shi, he also texted me somewhat frequently taking initiatives. i have to specify he's not a texter
The issue is, he's been more distant these last two weeks (leaving me on delivered for more than 24hrs every time); he told me he's been having some issues without specifying what happened (and that's okay), i also asked him 'do you not want to talk to me anymore?' and he responded with 'absolutely not, bla bla i just don't feel like being on instagram and in general I've been feeling shitty' and since saturday i haven't heard anything from him, my two messages in response where i said 'okay, i thought it was something limited to me' were left on delivered (we don't make calls, and it's possible he's been actively ignoring my textes. communication has became impossibile, he's literally unavailable). I'm not even mad ok, i know he might need some space, but trying contacting him has been making me feel like... I'm too much to bear? I called him twice this evening cuz i needed to know something from him (he has a performance and I wanted to know at what hour we could meet up, we haven't met for two weeks and before that we used to see each other maybe 2/3 times a week) and he hasn't answered, so am I in the wrong for expecting at least a message back asking what I needed?
I think this break of routine has left me overthinking, but I'm trying to stay positive since he has no reason to lie to me, although it's still making me doubt of him. Right now I'm telling myself to wait for him to respond or, at this point, directly meet him this Tuesday...