If you're irritated with a loved one now, they're certainly going to know about it. In fact, everything you feel will be quite obvious to whomever you're with, and those feelings will last for a long, long time. That means you have a decision to make: are you going to be polite and stifle what you're feeling, or just let it out? There is a happy medium and you, of all people, can manage it: be direct, but civil.