Everything you feel will quite literally be written all over your face now. Everything. So if you're angry, don't bother trying to hide it. If you do, you'll only end up snapping at everyone you come into contact with. Instead of all that, why not just tell the person who's pushed your buttons exactly how you feel about what they've done? You don't have to be mean about it. In fact, the calmer you are, the more firmly you'll make your point.