On this reading she really can't be with Angel. He's cursed with the soul and at odds with himself. Unless Angelus can be made to get on board with the soul; or maybe if Buffy comes apart enough that she's divided between the human and her demonic powers within herself.

Of course, there are other readings possible, and it could well be that on those readings Angel and Buffy belong together. I'm attached to this one though, so I'd be pretty squicked. But that certainly doesn't mean that other people have to be in the same boat as me!!