Always, always, always check your motive before communicating a boundary. Ask, “am I trying to change them? Hurt them? Prove a point?” If so, it’s best to hold off. Sleep on it. Chat with a safe friend. Journal. Regroup. Let your emotions regulate + then proceed.
Boundaries are best when motivated by a desire to keep you safe. To hold you in. To bring you, back to you. To set down what isn’t yours, to care better for what is. It’s less about the other person + more about what you need to continue showing up as your best, most authentic self.