TLDR: A new guy I'm seeing is sending mixed signals, being distant, and now he took some things of mine.

I (36 f) recently started dating this guy (28 m). It's now been a month. It was amazing the first week, we hit it off instantly, it seemed honestly perfect. He seemed to possess things I really want: Highly intelligent, forward-thinking, handsome. We made such an amazing connection. He asked me to date him right away (red flag). I did agree to see him exclusively. We live an hour away and I don't drive, also he lives with his family at the moment so I can't visit.

But now this subtle, business-like distance on his part has gotten worse. We went on a road trip and he told me he used to have phimosis that is cured, so that he never had penetrative sex. He wasn't able to perform, and I myself was nervous that night. I am very empathetic and understanding, and told him I am very patient. I assumed that was part of his distance causing him anxiety.

But he has continued being distant, emotionally and physically. He's more busy too, he blames school and work - But he maintains this distance. He doesn't comment on my appearance, despite saying he is attracted to me. Doesn't really show much empathy. Doesn't seem particularly ready to get into bed with me in whatever ways he can. When I do see him, his affection is minimal. Doesn't draw me out like he did that first day...It's so weird. I don't really even feel like we are dating... He did say his ex was a bit toxic, but still...My ex was toxic too...It doesn't stop me from being affectionate... I've had such a hard time finding someone, and I've been through a lot. I'm also neurodivergent on the high-functioning end of the autism spectrum.

Then to add insult to injury, while on that road trip, he took 1. a unique quartz my friend gave me, assuming it was a gift for him 2. a rock I found while hiking (until he realized they were actually plentiful) and 3. My phone charging cable, claiming it was an accident (but I don't believe that). He actually did admit about the quartz, "I think I just took it..." He drove out and returned my things, but still...

I am very confused, and not really sure how I should proceed. Am I overreacting by being concerned by those little things he took? Shouldn't he be not so distant and weird? What is going on?