Rachel: No. I can't. You're a totally different person to me now. I used to think of you as somebody that would never, ever hurt me. Ever. God, and now I just can't stop picturing you with her. I can't. It doesn't matter what you say or what you do, Ross. It's just changed everything. Forever.
Ross: Yeah, but this...this can't be it.
Rachel: Then how come it is?
Ross: Yeah, but this...this can't be it.
Rachel: Then how come it is?
Rachel : No. I can't. You're a totally different person to me now. I used to think of you as somebody that would never, ever hurt me. Ever. God, and now I just can't stop picturing you with her. I can't. It doesn't matter what you say or what you do, Ross. It's just changed everything. Forever.
Ross : Yeah, but this...this can't be it.
Rachel : Then how come it is?
http://www.tv-quotes.com/shows/friends/quote_3034.html