I had the worst jealousy all my life. It started in childhood with my sisters, then just developed in strength when I began dating. I believe it stems from feelings of worthlessness, lack of self esteem and confidence.
When I had children, it was even worse. I was lonely, held down by responsibilities and had a lot of time on my hands to think. It began with intrusive thoughts that I just couldn't shake and was so painful. I would lay in bed and start arguments with my ex because of thoughts of him with his exes and so on.

I went into therapy for my anxiety and obsessive thoughts and began taking pristiq. I haven't had that jealousy pain in a long time now.
The help with my anxiety stopped me from fearing to go and do things that I wanted to do, following my goals and generally leaving the house. When I wasn't so down on myself, it got so much better. The pristiq helped amazingly with this also. I believe pristiq is used to treat OCD as well so I think that played a HUGE part.

I wish you all the best in overcoming the jealousy, I wouldn't wish that feeling on anyone!!