Am being too paranoid?

Met someone new (1 month) and after being really hurt in some prior relationships I am much more aware of certain behaviors from a partner.

The new partner has a lot of qualities I'm looking for but there are a few early behavior things that I'm a bit concerned about, including the following:

1. He keeps telling me he's been looking for someone like me for a really long time and he wants our relationship to work. No doubt "he's really into me".
2. He visited for a holiday and decided to take a train instead of driving. He asked me to go online and buy the ticket and he'd reimburse me. Well he came and left yesterday but I haven't seen any $ yet. I feel awkward asking for the $ and reminding him (he should remember).
3. He seems very thoughtful and generous. He brought wine and flowers, etc. to me and a new electric toothbrush (he is a dentist). I purchased the holiday meal.
4. He pays for meals when we go out but I paid for parking for us and when I was buying a drink he went ahead and ordered a sandwich and then said "thank you" to me so I assumed he expected me to pay for it, which I did.
5. He seems transparent about his life - I don't think he is hiding anything from me but my adult son says he likes him "but feels like something is off". My son can misinterpret people sometimes but not always.

Does this behavior seem concerning? Again, I don't want to jump into a very serious relationship immediately but also don't want to invest my time and end up hurt and depressed all over again.

I feel awkward about saying anything but do want to say something - just the "right" thing though.