You really have to love this episode, just because of the final scene! It’s just so sweet. They don’t really speak, except of the nasty sentence were Willow indicates what will come next.
Well what happened else in this episode? Oz is back and leaves for ever, when he can’t stand that his former girlfriend has left him - for an other girl. So he goes “all wolfy” again, but gets caught by the initiative guys. So Riley has to make his final step to leave his past behind and move on with Buffy.
I think that’s all that needs to be mentioned, but the final scene is one of the best scenes ever! Just go trough the lines again and feel the love:
Willow: Tara, I have to tell you-
Tara: No, I understand. You have to be with the person you l-love.
Willow: I am
Tara: You mean...?
Willow: I mean. ... Okay?
Tara: Oh yes
Willow: I feel horrible about everything I've put you through and I'm going to make it up to you. Starting right now.
Tara: Right now?
(Willow nods and Tara blows out the candle)