Bella Swan Complex
When you know someone is detrimental to be around but you hang around them anyways. Derived from Bella Swan in Twilight, who gets together with Edward Cullen even though he tells her constantly that he could kill her.
Person A: He's such a jerk. Why do you hang around him?
Person B: I don't know.
Person A (to Person C): Person A has such a Bella Swan Complex!
Person B: I don't know.
Person A (to Person C): Person A has such a Bella Swan Complex!