If someone says or does something that offends you today, take a deep breath and do not over react.
Do not over react to something that's said or done by someone close to you today, it's not worth causing trouble over. It may have been a stray remark or a thoughtless action, and it may well have offended you, but is it worth splintering your relationship over? Take some time out and breathe. You can tell the person they hurt your feelings, but do not cause a big fuss.