I actually understand completely, pinkies and crawlers just get to me. It does get easier with time and I just think, some day soon my snake will eat bigger ones, course by then I will hopefully have more little ones.... The main thing is we are not killing them for no reason, they are dieing so my littlest snakes will live.
By the way, do not feed pinkies/fuzzies to big snakes... Just don't do it. Adult corn snake and rat crawlers, bad bad bad idea, I was nauseous for hours.