Buffy the Vampire Slayer, Season 4

Willow:
[Speaking of Oz's return] It's complicated...because of Tara.

Buffy:
You mean Tara has a crush on Oz? No... [suddenly realizes Willow is in love with Tara] Oh!!

...

Buffy:
[almost babbling with the shock of Willow's revelation] Well, there you go! I mean, you know, you have to... follow your heart, Will. And that's what's important, Will.

Willow:
Why do you keep saying my name like that?

Buffy:
Like what, Will?

Willow:
Are you freaked?

Buffy:
[overly insistent] What? No, Will! [pauses, then gathers her emotions] No. No, absolutely no to that question. I'm glad you told me.

...

Willow:
I don't want to hurt anyone, Buffy.

Buffy:
No matter what, somebody's going to get hurt. And the important thing is, you just have to be honest or it's going to be a lot worse.