Emotional blackmail is when someone tries to make you do what they want by making you feel bad. For example, if your friend said something like, "If you don't do what I want, I won't be your friend anymore," that would be emotional blackmail. It's wrong because it's not fair to try and make someone feel bad just because you want them to do something. The best thing to do is to say "No," and explain why you don't want to do it.