How to make my bigger?!?

Do Pilates!! It's the best exercise when it comes to toning your and just overall toning your body! Its also great for a flat stomach, but by the sounds of it, I don't think that's your problem :) I do Pilates and it works great as long as you do it right. Take a cl on it at the gym or rent a beginner video on it. Good luck and be patient! :D