I've been traumatized as a kid when riding my bike my brother pushed me down a steep hill when I wasn't looking and I nearly got run over by a car luckily they saw me and stopped. I know OP's pain I've had to make excuses to some of my friends of not being able to go ride bikes.

Tell her, she may think its adorable and offer to teach you...especially if she likes you.

Just tell her why you declined, but ask her to teach you. Girls usually love helping others that they like

Don't feel bad, I didn't learn until grade 6

If you played this right it could definitely work to your advantage!

Nothing to be ashamed about! Get her to teach you soon or else you'll be sleeping like a bicycle too. All night on your stand

its ok bro.... i turned down a girl who prolly wanted me to come with her at midnight while holding a McD's bag with food.... i feel jerky haha

Wow dude I learned at three without training wheels it's not rocket science you better lean quick lol. Good luck

I find it funny that people are so aghast at this. I don't "know" how to ride a bike either. I know I could learn in a matter of minutes if I wanted to... but to be honest I couldn't give less of a shit about learning. Newsflash: you can actually survive in life without a bike! Amazing isn't it. People have weird ideas about what desperately needs to be learned in life. Bike-riding certainly isn't one of those things.

OP, I'm 18 and never learned to ride a bike either. Just be honest with her, and suggest something else you two could do together.