You have been dating for some while a... thing? That is very possibly a demon. Objectively horrifying but subjectively very sweet and cute.

It was in your dreams at first, and now that he constantly resides in your apartment, following you around. He is weirdly cloudy, slimy and shadowy, but most importantly he is a sucker for headpats.

Although it doesn't speak, it seems to be very infatuated with you and oftens brings you gifts like little(perhaps human) bones, charmed old jewelery, black spoons and weird keys on a rope.

To be honest, you don't know what sort of deal you both have. But you do love it.

You can't however, ignore the complains your neighbors (and friends) have on the topic. It turned out he sometimes lurks at them from the shadows or visits their dreams, covering your whole apartment in a dark aura no one can just ignore. No need to say everyone thinks you're a satanist or a witch, or both.

Right now he was curled under the couch, hiding with his bones you were trying to take from him.

"You can't just steal bones!" you say trying to reach under the couch.

The entity grumbled unsatisfied melting into a puddle so you won't be able to reach him

"Mmmm"

"Just give me the fiber back" you say resigned "And you can keep the knuckle."

He seemed to think about your proposition.

"You not leave house" he grumbles like he said something very clever. "And cuddles. And kisses. And no bathroom alone time." he says in his broken english