This conversation is from "Youth in Revolt" movie.
A boy named Nick met his colleague, a girl, in a music shop while purchasing a DVD and after a little talk, her boyfriend hugged her from behind in front of Nick. Then the girl chuckles and says: "Chad, fuck you". He replies — "Oh, fuck you, you love it."
Obviously, fuck here doesn't mean "sexual intercourse" or "destroy or ruin" or "make someone angry", which are meanings from Oxford Dictionary online.
What is the meaning of fuck you here?
"Fuck you" can be used to mean roughly "go to hell." However, in this particular sentence I think it is used jovially. In some cultures it is common to use a pretty brutal insult against a friend and mean it in an affectionate way. In essence saying "you're an ass but I like you anyway." So literally it means "go to hell", but in this case it probably means something closer to "you're a likable butt head."
Update: I was thinking about this some more, and I was curious about the real meaning of the insult. "Go to hell" makes a specific statement of what bad thing you want to have happen to the target of your insult -- that they go to a bad place, For sure, it is perhaps not meant literally, but at least it has some specific hurtful desire in mind. However, the meaning of "fuck you" did not have an obvious meaning to me, in the sense of expressing what particular bad thing I wanted to happen.
However, I came across this quote from Carl Sagan which seems plausible, and I thought might be interesting from an entertainment point of view. I don't assert it is correct, I just offer it as an interesting data point.
I should add that this meaning that Sagan proposes does catch an important nuance of this particular insult: the meaning of "I assert my dominance over you."
I would rewrite the exchange as:
"Chad, you know I hate it when you do that." (or, "Chad, I wish you would quit doing that.")
"Oh, you know you really like it."
The implication to me is that maybe she doesn't like it because it surprises her or she doesn't like this type of public display of affection. She's told him so, but he continues to ignore her because he knows that she doesn't mind it that much.
