If i feel nothing to her firstly I warn her politely : "please do me a favor and not tell again i really never wanna lose my best friend because of unnecessary heart diseases" :))) If i was looking for excuses to express my feelings sure it is that time i think :) So i say her what a nice coincidence, i love you too my dear :))) At hence, how you behave is up to you, i like express my feelings with sense of humor

I will look back how her/his characteristic is. Then I will give him/her smile, if I love him/her too, or I will say :"I love you too".