If you’ve seen Zac Efron’s performance in the Ted Bundy biopic Extremely Wicked, Shockingly Evil and Vile, you likely have a lot of questions about psychopaths and relationships. The movie might have you questioning whether Ted Bundy’s ex-girlfriend, Elizabeth Kloepfer, knew she was in a relationship with a psychopath. How can you know if you’re dating someone with antisocial personality disorder? The Cheat Sheet reached out to experts to learn more about this topic. This is not an exhaustive list, but here are a few signs you might be dating a psychopath.