If you keep saying yes and feeling bitter, the yes wasn’t honest.

Resentment is usually a receipt for an agreement you did not mean. You wanted to be helpful, or to get past an uncomfortable moment, so a yes came out, and the bill arrives later as irritation toward somebody who only asked a question. They cannot see the gap between what you said and what you meant. You are the only one who can close it.

When bitterness turns up, trace it back to the yes it came from and notice what you were avoiding. Try the honest answer once this week, even if it lands clumsily.