In Love Actually Mark was in love with Juliet, but he couldn't tell her, and now she's married to his best friend. Since it's Christmas he finally tells her (with cue cards). He smiles, and leaves ... but she runs out and kisses him and runs back inside. He then says, "Enough. Enough now."
What the heck does he mean? What's he thinking? I love the movie and the "deleted scenes" on the DVD share a little more insight into Mark's damaged character. But I've always been confused about his line and his motivation.