I always say "I Любовь myself too" in response to other people that aren't my boyfriend или my family, and they always have that look on their face hahahahah.
I'm guessing something to do with rape или killing или torturing. That would be a horrible response.
LOL once I had this boyfriend (he used to be my best guy friend befor that) who told me he loved me a lot but unfortunately I realized I didn't Любовь him back so I usually answered... *awkward silence*, "thanks", "okay", *this is just our first date, omg!" haha, it was pretty bad xD