Student or Learner
Answer for a question with do or does, will emphasize the answer.
Eg: Yes I do. Rather than say yes. Will that give more strong point of view.
Could you clarify me about this please.
***Neither a teacher nor a native speaker.***
I corrected some of your mistakes.
Just look at the quotation.
Yes, using do or does in such sentences emphasizes the answer.
She: Don't you love me anymore?
You: Yes, I love you.
You: Yes, I do love you. -> Probably the better choice.