I kind of wish they hadn't had that moment when they were flying and he proposed living together in the future, because now there's this air of dread with all their interactions - what's the reason she pulled back on him initially?
Will performing the ritual kill him? She has to get her powers from something, and he might be a sacrifice.
Does performing the ritual mean they have to separate?
Perhaps performing the ritual means they lose emotions or something, like she can no longer love when she becomes a full witch.
Anyway, I hate having this question dangling over all their cute moments together.