Amy will eventually allow Sheldon back into her life, but the intimacy will only go so far. He will have to wait until the wedding night. Although, I doubt Amy will want to have along engagement period.
Well, those are my thoughts. It remains to be seen what the writers have in store for us. Doubt they will drift too far from the storyline plot playing out for years.
I am not so sure that they will get back together. I think that Sheldon will keep trying to win her back
but I'm not sure Amy will take him back. I hope they do get back together but I am not positive
that will be. We shall see I guess!