Also:
I’m being hard on you, but @flipcollar said it best:
Rejection is a part of life. I’ve been rejected by women, by employers, worked in sales and had tons of misses, fought Muay Thai and lost most of my fights, and missed attempts in the gym.
If you’re as cool with this girl as you think you are, I’m sure you’ll be able to be friends no problem. Just be cool and be real. If this is a common thread among all girls you encounter, maybe there’s a problem that needs to be addressed.