I was trying to think of all the different paths for this au but reading HCs on the last post by @letaintedserpentine they had it spot on.

When Zim comes back, he’s furious that Zib has fucked up, ruined everything. He doesn’t stop boiling with rage but Zib eventually does break down. After a while, Zib barely responds to Zim, sulking in places, telling the hologram to go away, etc.

Normally, Zib would have pushed Zim away too much that the personality is gone and he’s left alone.. but that doesn’t happen. Zim stays, gets to know the Zib, they talk it out. Then nothing progresses. Zim is stuck, he doesn’t grow mentally, he’s slowly losing old memories in order to create new ones and eventually, Zim asks to be let go.

Zib refuses, he just got to know Zim, he can’t lose him. If Zim goes, he’ll literally be all alone in the void. He can’t have that. But Zim begs.. his life is done. The Pak can’t be removed from Zib or he’ll die, and they don’t have the materials and resources to get a new body for Zim, even then, he’s still restrained to the Pak. They can’t co-exist and they both know it.

With heartfelt tears, Zib says his final goodbye to his only friend left in the void and free’s Zim from the binding code, now he’s all alone in the void.

Kurt is heartbroken and doesn't know when Blaine will return or what will happen when he does. So when the school gets a new spanish teacher who is attractive and openly gay, he crushes on him, trying to fill the hole in his heart. Nothing comes of it, it's just a schoolboy crush, but it lets him heal.

The next week, Blaine comes back. Kurt feels guilty for having feelings for another man and confesses to Blaine. Blaine is hurt because he loves Kurt more than himself and the make up. But before everything can get back to normal, they decide that when Kurt leaves for college, they will agree to see other people, just to test whether or not they are soul mates (since neither of them is very good at romance).