why edward's eyes didn't change in color when he tasted bella's blood?

Power of love? I guess. He don't want to hurt the woman he l’amour most in the world.

idk i was thinking the same

I'm guessing he didnt have enough. He only had alittle of Bella's blood and after years and years of drinking animal blood, he would probably have to drink a few humans completely dry to make his eyes turn red...