My version would be something like this:

Angel got a phone call from Giles that Buffy's in trouble "The Immortal". Spike overheard the situation about his slayer is in trouble by there worst enemy.


Spike: Look I not going to win over her just to save her, well I am going to save her because I love her.

Angel: Are your sure, I mean do you really think that Buffy would still want you back?

Spike: Oh, I see you think that all powerful with a soul, but look I fought for my soul for Buffy. You just got it because it was your punishment for being all evil.

Angel: Shut up! You don't know her they way I...