It would suck worse if they sent back, "Cool story, bro."
It sucks when someone tells you they love you and you know they don't mean it, amirite?
I used to say "I love me too."
Unless you have only known each other for a week :p
Or they dig for a compliment and ask why, it makes you want to take it back.
Sounds like Harrison Ford: "I love you. "I know"
I've said "and I've grown fond of you Lois" it gets a good laugh
"Jake I..I think I love you"
"SLIM THUGGA MUTHAFUCKAAAAA THA BOSS OF ALL BOSSESSSSS"
Or maybe they say, "thank you".
Sometimes when I say I love you to my boyfriend he'll say "No you dooon't" and then we'll get into those stupid I love you fights.