Your problem was not driving 1 hour, but being inconsistent in your actions. If you like her that much, you have to wow her with large bouquets of flowers, not 1 flower. It's retarded and makes you seem like a dumb man who's not sure of himself.
Sometimes women like to receive attention (always), and being assertive does not make you desperate. Being shy (one flower) and desperate (1hour driving) does make you creepy though.

If you want to pursue this further, go nuts and do something crazy for her. No reserves. A real man is not scared of failure, but scared that his real feelings will not clearly and correctly communicate through.