Morbid Jealousy
I left my marriage of 5 years six months ago. He was abusive but much of it was spurred by my constant jealousy. In the beginning of our engagement he was having an online and text relationship. After that, though, he made every effort to be faithful but I never believed him. I searched his computer, his phone, I attacked female friends on his Facebook page, I was jealous everywhere we went and I would wake up in the middle of the night and sneak to look through his phone. He would always get very angry when I didn't trust him and understandably so. This is not the first relationship I've ruined in this manner. I am Bipolar, with a serious suicidal history, I am on medication. Psychotherapy only goes so far for me, as I've had years of it since I was very young. What can I do to help myself and stop the urge to act on this constant jealousy and fear Thank you!
Source: Mental Help Net Questions and Answers
Morbid Jealousy
The mental disorder: Morbid Jealousy and its related debilitating characteristics can be Discussed in this Thread.
I feel its natural for anyone to be jealous over something or someone they really love BUT it should never reach the stage of paranoia or violence because at that stage you're talking seeing someone for help.