So I just saw two new theories.
Theory one: that the reason the Bone Guy took Hope and Landons hair was because he wants to use their DNA to make a vessel completely immune to Hope(even though I still Hope was temporary toxic to Landon). And that's when the "I was made to love you" comes into play. I'm really hoping this theory won't be true. They've been through already. And that theory would only half make sense because why would Malivore make another vessel to love Hope?
Theory two: that Hope is being infected by something because of that slug comment and because she was being all happy. But if you think back to what she said in 1x11 "the only thing stopping me from being happy is me" and what she said in 3x04 "I just had to let myself be happy with you". So it just seems like and feels like to me that she finally letting herself be happy. Or the very least trying to.
Random thought: so I was thinking about the wish artifact and how at the end of 3x04 when Hope dropped it in the lake it start it work not to soon after. Then we Landon in Malivore perfectly fine and even after he got out he was. So I'm thinking it didn't actually do anything to Landon. Or maybe it's either the artifact takes a really long time to actually work or it just doesn't do what anyone think it does. Because I know Alaric I wanted to learn more about it before using it and even now he wants to learn more about it's history. And if it doesn't make wishes then I'm not sure what it could do. Also if it didn't actually work on Landon Im back to thinking maybe Landon learned/found out something about what malivore or one of the monsters were planning so the blocked his memories so he couldn't tell anybody. But I don't know at this point it this it could be anything which also makes it so confusing as well. It makes me believe the writers wrote it take way so people wouldn't figure out what's gonna happen. I don't mind that I actually really like that. But at the same time I don't because it's hard to guess what's an actually possibly and what isn't.