From the archive

You're not a good person. You're just afraid of conflict

There are also situations where a direct refusal really is dangerous. If someone is threatening you, controlling your money, or might become violent, “just say no” is useless advice. First you need a way to protect yourself and get support, not an impressive argument on principle. But if it's an ordinary friend who wants to take up your only day off again, check: are you actually in danger, or do you just not know how to sit with someone looking displeased?