Buffy and Angel! Their star-crossed amor was amazing for each other, despite their inward and outward struggles! I think Buffy and ángel both always knew it in their hearts that the other one was the only person they could ever truly love! I liked Spike and Riley both, but I don't think she every really loved either of them. She obviously cared deeply for each of them, however.
Buffy and ángel forever!! How can tu argue with perfect happiness? Plus, I quote Buffy: "I would have dado up everything I had to be with--[Angel]. I loved him más than I will ever amor anything in this life."