What to do when you say something you regret at work

How do you handle it when you say something you regret to a co-worker? Do you immediately take it back, not say anything and hope it goes away or she forgets? We'll talk about it. Also how do you handle the boyfriend of your best friend who snubs you?  And should you cook a meal filled with meat for your friends when you are a vegetarian? And what if someone is taking advantage of your good nature? For instance, you offer to tutor someone, only you are doing all the work!  Also, what if the bride wants her close guy friend as a groomsman and her fiance is not happy about it? Lots to talk about in this show!