I was really rude this morning

I was walking down a road earlier and heard "Good morning". I turned my head and it was a man coming out of his house to his car. I said 'good morning' back and he tried to start a conversation, but I kept walking. That was really rude of me, but I just didn't want to talk. He gave me an awkward thumbs up. 

I went to the shops and bought some spicy chicken wings. I put them on the conveyor belt. The guy in front of me in the queue looked at my wings and said, "They look tasty". I just said, "yeah..". and gave hima smile. That was rude. He looked away. I'm not one for banter. I was in Superdrugs getting my perscription the other day and a woman was talking loudly to the pharmacist that was preparing her medicine.  Her voice was like a hammer on my head. 

I don't know what I have. Autism? ADHD? Maybe both?

I don't know.