Why do I get so jealous when my spouse talks to other people?

When you stood at the altar and looked into the eyes of your beloved, it felt like he or she was the only person in the room. As you turned to walk down the aisle, for the first time as husband and wife, you notice the camera flashes and the tear-soaked faces of dozens of people around you. Where did they come from? Slowly, the realization hits you: you and your betrothed are not alone on this planet. There are others! Are they a threat?

When we marry, we assume the connection we have with each other will be strong enough to fend off outside threats. But bonding together in holy matrimony stimulates, in some people, an intense sense of possessiveness. In some ways, this you-belong-to-me-and-I-belong-to-you mentality is sweet; it’s the stuff of pop songs and poetry. But sometimes the intensity of that connection is too strong. When one partner sees everyone whom his or her mate comes into contact with as a potential threat, it is a sign that jealousy has taken hold. Shakespeare called it "the green-eyed monster," and once it gets a hold of your relationship, it sinks its teeth in and can rip it apart.

If you’ve got strong feelings of jealousy, it’s probably a sign that you don’t have enough trust in your partner that he or she is being faithful to you. That lack of trust may be prompted by one of four factors.

1. You may feel insecure about your self-worth. In these cases, either you’ve been raised to believe, or some part of your inner-self feels, that you just don’t measure up. Because you don’t love yourself, you can’t believe that others would love you, so you live in fear that your partner’s “true” feelings will be revealed, and she will leave.
2. You’re prone to cheating on your partner—maybe even have done so—so, knowing what you’re capable of, you project that behavior onto your spouse.
3. You and your mate haven’t yet figured out how to establish safe boundaries within the marriage. Having a tight relationship is about building walls around your love with windows that allow others to be part of it—not doors where competing lovers can walk right in and disrupt your home. Because you don’t know what’s permissible within the marriage, and what’s not, you’re constantly on your toes.
4. Your mate is cheating on you. Infidelity doesn’t have to include sex; it often has to do with making emotional connections to others outside the marriage. If your partner is sharing things about your private life with attractive members of the opposite sex, it robs a sense of intimacy from your relationship and leaves you feeling vulnerable.