Girls, Interrupted (Californication season 1, episode #7)

Becca: You never mean to let me down, but you do.

Hank: Yeah, I guess I do.

Becca: You know, it's all well and good to talk about happy endings, but if a person can't deliver, if you keep screwing up, well, eventually I guess he kinda just have to say 'f**k you' or words to that affect.