Kill with kindness - When someone is very kind, we say he kills with kindness, especially when that kindness irritates.
1. He always asks me if I am alright, I know he does that with a good intention, but he kills with kindness.
2. He really killed me with kindness; I had never hoped he will take care of me the whole night when I was ill.
3. Mahmood killed me with kindness by dropping me to my school; otherwise I would have not reached on time.