Do you know that I'm 22 and I can't drive?
Why have you waited so long to learn?
I don't know. I'm a total loser.
It's good to learn skills such as driving, as they can help you to be a self-sufficient adult.  But not knowing how to drive does not make you a loser, and you shouldn't be ashamed to admit that you need help to learn how.
No, I'm a loser. Everyone's just being polite and then talking behind my back.
That's in your mind. Most people would understand that some people haven't had the opportunity to learn to drive. They're more compassionate than you give them credit for.