Now, I am no sappy romance lover but I really feel it for these two. Sure, Lapis hated Peridot and held her responsible for her self imprisonment, but now, she feels a whole new way!
Remember in "Barn Mates" when Peridot tried so hard to befriend Lapis?
http://i.imgur.com/VkBLCzV.png
And in more recent episodes (The Beta) they're "best friends" (or something more) watching "Camp Pining Hearts".
http://i.imgur.com/BhLhowJ.png
Same episode. (And remember? "Lapis, we have guests!")
http://i.imgur.com/oniC4q9.png
And in the latest episode when asked to come on a spaceship.
http://i.imgur.com/VkBLCzV.png
I believe that they may become a perma-fusion like Garnet where they do it for love instead of strength.