Much of the time, insecurity is to blame for jealousy, not to mention low self-esteem. Take time to do good things for yourself and build your confidence by shooting down negative thoughts about yourself before they happen. You'll build your self-esteem slowly but surely and stamp out those envious notions before long. If you're not sure why you're jealous and can't seem to stop feeling that way, talk to your partner. Tell him that you feel jealous and ask questions; however, it's not OK to interrogate him every single time you have those feelings. Relationships are built on trust; consider the level of trust he has in you. Is it really fair not to reciprocate?