"You're not friends. You'll never be friends. You'll be in love till it kills you both. You'll fight, and you'll shag, and you'll hate each other until it makes you quiver, but you'll never be friends. Love isn't brains, children, it's blood -- blood screaming inside you to work its will. I may be love's bitch, but at least I'm man enough to admit it". - Spike, "Lover's Walk"
Spike really is deeper than most viewers give him credit for. And it means all the more coming from a human shell with a soulless demon in it. You expect such things from Angel, who has a soul, but not Spike. I kinda think William the Bloody got the short end of the stick, when it comes to the demon who took him over. Kinda a wimp, when it comes down to it. But I guess we can't judge him for getting his ass kicked by Buffy non-stop throughout 6 seasons of Buffy. She pretty much kicks any one's ass, soul or no soul.