Don’t assume someone’s into you just because they agree to go on a date As mentioned above, Americans are dating hobbyists, so you might find people prepared to go out with you just to keep their hand in, so to speak. On an American date, it’s perfectly acceptable to turn up with platonic intentions, admit this early on and still have quite a nice time.
If not, you are "going out" with each other, even after three months.
As Rich Carter suggests, you are the victim of a massive culture clash here.
Brits simply don't do American-style dating where it's acceptable for someone to be seeing multiple other people at the same time.
However, it's made me think about the differences between us and our pals across the pond.
The American men I've dated were (coincidentally) all from DC.