Russell at 2011-02-26 16:44:53:
From Empire Strikes Back:

Leia: I love you.
Han: I know.

From Princess Bride:

Westley: As you wish.
Kyle at 2011-02-26 17:07:32:
rushmore: she's my rushmore max

http://www.youtube.com/watch?v=Ts3pNaMRmfE
GF at 2011-02-26 17:16:44:
In A Lonely Place.

About five minutes into this clip: Bogart as the screenwriter telling Gloria Grahame he loves her by pointing out that a good love scene should be about something else besides love.

http://www.youtube.com/watch?v=3G0YT8GuMPE
Annika W at 2011-02-26 17:50:56:
Ooooh. "She's my Rushmore, Max." One of the best lines ever.

Also, even though it ran around New Years if you get in a pinch Scott, there's the last part of Harry's speech from the end of When Harry Met Sally: "I came here tonight because when you realize you want to spend the rest of your life with someone, you want the rest of your life to begin right now."

And maybe I'm reading waaaaay too much into this bit from Aliens, but I've always thought this was Hicks saying "I love you" to Ripley:

RIPLEY: Hicks, I'm not going to wind up like those others. You'll take care of it won't you, if it comes to that?

HICKS: If it comes to that, I'll do us both.
AJ at 2011-02-26 18:10:35:
Kat's poem at the end of 10 Things I Hate About You

http://www.youtube.com/watch?v=gGV4hxhxW8o
januaryfire at 2011-02-26 19:02:49:
Jerry McGuire. The "you had me at hello" scene.
Adrian at 2011-02-26 19:06:02:
"Shut up and deal" - Fran, The Apartment.
smoothlatinkid at 2011-02-26 19:46:02:
After his dying friend Doc Holiday pleads with him to leave before he dies, Wyatt Earp starts to walk away, looks back at his best friend, and smiles--

"Thanks for always being there, Doc."

And he leaves.
--Tombstone
Francisco Magdaraog at 2011-02-26 20:42:46:
I nominate Rob's reason for proposing to Laura at the end of High Fidelity.

Rob: I'm tired of the fantasy, because it doesn't really exist. And there are never really any surprises, and it never really...
Laura: Delivers?
Rob: Delivers. And I'm tired of it. And I'm tired of everything else for that matter. But I don't ever seem to get tired of you, so...

http://www.youtube.com/watch?v=2jSDoOldNuU
david at 2011-02-26 20:56:17:
Perhaps not far enough removed from the requirements, but still made me grin a little:

Sex Drive (2008)
Felicia: You love me.
Ian: You love me, too.

And then of course, there's always this ol' staple:
http://www.youtube.com/watch?v=OC0_WmotPR0

RIP Heath
Scott at 2011-02-26 21:55:10:
Wow! Look at the GITS community represent! I go out for a few hours to see In The Heights (terrific!) and come back to find all these great suggestions.

You rose to the challenge!

Thanks. And keep the suggestions coming. Maybe we can do this for 2 weeks.
Peter Dwight at 2011-02-27 02:23:09:
Scott Pilgrim vs The World.

...because I'm in lesbians with you... I really really mean it.


http://www.youtube.com/watch?v=d0Tr--rzI5k

:D
judy at 2011-02-27 08:03:41:
The top of the Empire State Building scene of "Sleepless in Seattle."

It's all done by action -- Annie and Sam arriving at this location at this time, a couple of looks and holding hands in a way that "feels right" -- with dialogue limited to introductions to one another.

The whole scene pays off two big set-ups: both character's awareness of the movie "An Affair to Remember" and Sam's recall that he knew he was in love with his late wife when they first held hands and it simply "felt right."
BooksSaved at 2011-02-27 22:22:16:
Russell,
I also love "As you wish". I think it gets to the true meaning of the theme.

That said, I couldn't fail to mention from Ghost:

Molly: Ditto

http://www.youtube.com/watch?v=gxAXKTgnMrk
Bill Weinberger at 2011-02-28 06:45:21:
Edward Scissorhands

Kim: You're here... They didn't hurt you, did they?
[Edward shakes his head]
Kim: Were you scared? I tried to make Jim go back, but, you can't make Jim do anything. Thank you for not telling them that we...
Edward: You're welcome.
Kim: It must have been awful when they told you whose house it was.
Edward: I knew it was Jim's house.
Kim: You... you did?
Edward: Yes.
Kim: ...Well, then why'd you do it?
Edward: Because you asked me to.

http://www.youtube.com/watch?v=Hz_raSmUjpM

or

Kim: Hold me.
Edward: I can't.

http://www.youtube.com/watch?v=P4gTvnpO1fM
Todd Wallinger at 2011-02-28 10:20:09:
Following up on Annika's suggestion, you could use Sally's reply to that quote:

"You see? That is just like you, Harry. You say things like that, and you make it impossible for me to hate you, and I hate you, Harry. I really hate you. I hate you."
Electroglodyte at 2011-02-28 20:45:56:
Four Weddings And A Funeral:

Charles: Let me ask you one thing. Do you think - after we've dried off, after we've spent lots more time together - you might agree *not* to marry me? And do you think not being married to me might maybe be something you could consider doing for the rest of your life?

Carrie: I do.
Electroglodyte at 2011-02-28 20:46:35:
And a big AMEN to Todd's previous suggestion.