Partner(22) gave me(22) the silent treatment over me communicating that I am slightly annoyed at him for being late and not telling me beforehand that he will be late. Now my actual issue is not necessarily being late but straight up not telling me anything. Which I communicated via text before he arrived.
He is aware I rely heavily on schedules or else I don't function and forget a lot of things - I am autistic and otherwise severely disabled (this is communicated completely). So he arrived at my house and I text him that I need a few minutes. I said hello pretty normally, briefly apologizing for the delay via a "sorry", already starting to forget about me being annoyed in the first place(considering I let him wait as well) but I recognized based from his hello back that he was seemingly peeved. Instead of communicating with me that he currently has an issue with me he just asked me something about forgetting something in a cold tone to which I simply replied "no" to. We spoke not a single word after, until I asked him, lightheartedly, to please let me out at a store to quickly get something. Again his response was cold and short. I thanked him and apologized, lightheartedly, after getting back in and then at his house I asked him, LIGHTHEARTEDLY, if he would like to take a sip from my drink. All of his responses cold and short so I figured: he does not want to talk to me.
He got out of his car and didn't even wait for me, he just got in and completely ignored me, starting to play with his console.
After waiting for 2 hours and my phone running empty I eventually just left without saying anything due to feeling really uncomfortable and kind of not seeing a reason to engage with him if he is not gonna talk to me about his apparent issue. I asked his mother next door if she could drive me home. I briefly explained the situation and she was completely understanding. The place he lives at is in the middle of nowhere, roughly 14km away from my house with really bad public traffic(talking bus drives by like once a day).
I apologized later (after he spam called me) via text, I recognized leaving without saying ANYTHING probably wasn't the best decision.
He tried to excuse his behavior via saying he tried to give me "space" (that I obviously didn't even ask for.).
AITAH for leaving unprompted?