When I get irritated at an acquaintance and snap, I apologize to them. But what it really is, is an apology to myself. I feel I should have had better control over the expression of my emotions, and not let small things get to me. I feel shame about it, but no guilt. I know I should feel guilty, but I don’t.
I only feel real guilt if I snap at someone I love or genuinely like. Then, my apology really is addressed to them.