Well there are a number of ways, Nipple piercings tend to be behind the nipple itself "pushing" it out. You could create a suction extending your nipples whaich has worked for a number of people it feels damn good as well....
Breast pump and domperidone.
Be happy in the beauty you already have. You are unique and special for a reason. You will be perfect for the one who is perfect for you.
Yes, I do ! Bring them over and we'll see what we can do to help....!?
I can nibble on them all day?
Nipple rings with weights?
You might want to talk to a plastic surgeon. They seem to do everything these days!
But I definitely would not try anything "do-it-yourself", which would be painful at best and cause permanent damage at worst.
By longer you mean you want to just reshape them into the next size up? But why?
I'll bet there is a "How To" somewhere online