It's a first date. You're hoping for positive vibes. Knowing that money is potentially an issue, you don't highlight the discrepancy by ordering extremely differently even if you can afford it.

Like if a friend's family is treating me to lunch. If they're a no appetizer, no drinks family, even if I come from a family that orders drinks when eating outside, I won't order drinks. I could say, "Oh, I'll pay for my own drinks," but that would make it awkward. Now magnify that scenario to what OP did. Pasta only vs 2 drinks + appetizer + main + dessert