Ike Cantarino - Guessing Lessons https://www.youtube.com/watch?v=1o5us1lrcgQ
This is something that I can relate to on a personal level. Insecurities destroy relationships, there is really no fixing it. It sucked having to deal with it on a day to day basis. That was the only thing that was wrong with the relationship. She was a really cool girlfriend, very pretty and had a fantastic personality but the insecurities and being constantly questioned drove me insane to the point where I wouldn't even want to be around her as much.