I can relate to reacting to a thought that causes discomfort and giving a short incomplete answer to just move away from the thought. I am guilty of giving an answer without really processing the question because I don't want to feel the feelings brought on by the question.
Is that what was happening when you replied to your BS as you did? If so, it's not lack of feeling, but being uncomfortable with your emotions.
I frequently take a conscious pause before I speak to process what I'm thinking and feeling. Especially in emotionally charged or important conversations. It takes practice and I'm still working on it but have seen much improvement.