Not sure if this is okay but I'm trying to find a book I read forever ago paranormal romance demon, vampire, modern times please help!

What I do remember the main character is a girl and she get's forcibly taken to the demon real or something like that. The demon's first special lady friend died and he brought her there to take her place. Human's can't survive for long in the demon realm and she escapes I think there was an amulet of some sort involved. She wasn't feeling the demon relationship he took off on her and I remember her complaining about waking up alone and realizing he didn't really care about her. It was set in modern times, was for adults...I can't remember anything else please help.