Vicky Pattison explores the double lives, mental trickery and manipulation involved with real life cheaters and their love lives.Have you been love bombed? Tell us your story at lovebombed@bbc.co.uk.Online Producer: Rachael Smith. Executive Producer: Kathryn Morrison.
http://www.bbc.co.uk/programmes/p0f1rkfw
5. At the police station
Sarah suspects something isn't quite right when she asks Alex for proof of his identity and he sends a passport in a different name.
Contains themes of mental distress and suicide. Visit bbc.co.uk/actionline for sources of help and support.