looking through the facets of a plastic jewel

i got a letter from him today. it was sweet and loving and wonderful, like usual. it made me happy. but it wasn't the same. i don't know. i really don't know what to do now. if i ended it right now, it would be devastating for him, but if i didn't, i would just be carrying on something i didn't feel good about anymore. it would be like lying. but i don't want to give him a tremendous amount of pain. should i make it into a slow decline for him, like it has been for me? or should i end it abruptly, while i am still not completly over him?

i'll give some thought to your opinions if you send them.