The sound of silence
I like this post from Practical Theology for Women. Silence will always be interpreted as rejection, even when that's not how it's intended:
Silence has often wounded me more deeply than any other sound. It's the sound of someone's heart who is just not interested enough in me to even make an attempt. Many of us choose silence because we don't know what to say, but it gets translated instead as “I don't care about you” whether you mean it that way or not.