Easy answer!
Her: "I love you."
You: "And I love your smile."
hahahah
I've come across the issue where a girl has told me she loves me before I felt the same twice now.
Both times I kissed and hugged them tight. Then I expressed how much I really cared for them. I didn't say I loved them just that I really care about them.
The girl should get the hint. But if she presses, which has happend before, hehe. I'll tell her straight out that I'm not in love. That at some point I may fall in love but I don't feel that way yet. Yeah, they don't like to hear that but it's the truth. I've never told a girl "I love you" if I didn't mean it. And I never will say it if it's not true. I tell them how much I care about them. When I'm actually in love, THEN and ONLY then will I say "I love you.".
Word.
-Shadow
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I danced till midnight when the sky turned black,
It is hard to dance with the Devil on your back.
They buried my body and thought I'd gone,
But I am the dance and I still go on.