Lis will definitely get Luna killed in a way or another at this rate.
I hope it won't have to go that for just for Lis to learn that black witches must not love nor get loved.
I agree. Main thing is that Luna is not interested in Lis that way, so Lis is one-sidedly pushing his affections on her. Even if Lis is doing it on accident without knowing how magic can connect dreams, it's heavily crossing Luna's boundaries.