Future Spuffy

OK so I'm looking for a story that's set in the future. So spike is like the leader of some group and the watchers decide they need to bring back the best slayer so they resurrect buffy. Since spike is the only one buffy knows even though he doesn't want them to they get close. I also think I remember there was some girl in the group who spike was messing with and she was very very jealous of buffy...??? Help if u can

It might by 100 Years of Solitude by Isabelle.

If the one above isn't it (I've never read that one) this could be Future Imperfect by cousinjean but I don't think there is any Spike/Other in it.
In the year 2336, Buffy wakes to find she is humanity's only hope for the future, and Spike is the only link to her past. Contains spoilers for Season 5. Set during and 335 years following "The Gift."

Know I'm late but thank u it was future imperfect i appreciate it.

No problem.