I'd put people in their place when they bullied me. I would confront them.
I would try to love myself more and not be so hard on myself. Not worry about the opinions of others
I would take more photos of myself
I would make more time for fun and adventure
I wouldn't people please as much, I would be myself
I would go back and tell myself that failure isn't a bad thing. Perfection is not a good coping mechanism