Wait until you get one that you take home and eat and see how guilty you feel. You will probably feel more guilty about killing it for no reason than you will for killing one for a meal. I have hit shot two deer that got away from me. I felt really bad about it, but I am getting over that. I know that when something dies in the woods, the other critters get to eat too. So while you didn't get it, something else did.
As a case in point, when I get a deer around my house, I drag the remains into the woods behind the house after taking what I want from it. By the next day, crows and buzzards are going to town on it. In at least one case, something larger dragged off the entire deer. Most likely coyote.
In nature, very little goes to waste.