Your yes means more when people have heard your no.

Agreement only carries information if refusal was possible. Someone who says yes to everything is not being generous, they are being predictable, and their approval stops meaning anything because it was never a judgement. A few honest refusals make every acceptance a real signal. Constant agreement also wears people out and earns them less than they expect.

Say no once this week to something you would normally absorb, and say it plainly without a long justification. Notice that the relationship survives. Then let your yes be a full yes, given properly, to the thing you actually chose.