Split it fair, even when your friend wouldn’t notice the difference. You would.

Getting away with something is not the same as it not happening. The two dollars matter far less than the story you had to tell yourself to keep them, because the story stays and the money does not. Nobody else has to catch it for it to have an effect on you. You are the one keeping the ledger.

When you split something this week, do the honest maths even with nobody checking. If it lands in your favour, say so out loud. It costs a second and keeps your own account clean.