You paid for everything else, why are you stressing over this?
Here, do this.
During the next date, 20min in or so, fold the 10dollar bill into an aeroplane shape n give to her playing it off as present. Or say, hey look what I made...
Something silly along those lines, and be sure to carry some cash with you next time...
Fuck, I swear to Zeus women aren't worth it LoL