Spike notices the uncertainty and frowns a bit. He goes over to Buffy and cups her face in his hands, then kisses her softly.

"My most frequent sparring partner lately has been a demon god-king, you know. And she doesn't love me." He tilts his head, frowning. "Though I think she does like me. Or at least tolerates... not the point. I can take a lot of damage, love. And I trust you." He leans his forehead against hers. "We both know the steps of this dance. Come on, Buffy." He grins. "You know you want to."