I feel really bad for Spike! At first he wants to kill Buffy. Then he falls for her. She wants absolutely nothing to do with him, and doesn't spare a chance to tell him what a no-good good-for-nothing nothing he is. No, really, she tells him so many times how worthless he is, and he hates himself for it; so he tries to get a soul so she'll love him. It drives him crazy. She still doesn't like him. Good gosh, woman! Have a heart!