I know alot of people that feel this way. I think the only advice I can give is to decide why you feel this way? Is it the taking of a life? is it the blood etc? than decide how you can overcome that challange.
For example if its the taking of the life of an animal - like said above only take the shot if you know you have one that will efficiantly and quickly take down the animal. also remember your helping preserve other animals by doing so. Again it goes back to the food, dont just kill it to kill it - find a way to harvest the meat for you or pets.
If you dont enjoy it dont do it. - Use a camera like o_O said.