To help you avoid letting jealousy turn you into a psycho, top relationship experts suggest the following advice.

Be Confident In Yourself.
“Jealousy often stems from the fact that we’re very insecure. Don’t compare yourself to your boyfriend's ex-girlfriend. He likes and wants you now, so whatever the ex has or looks like, he doesn't want anymore,” says Orbuch. “Focus on your strengths, and the things he likes about you. Remember, your self-worth is not related to your partner’s past relationships.”

Don’t Let Him Know You’re Jealous.
Whether you prefer to talk to your best friend, mother, sister or therapist, it’s usually better to discuss your jealousy with anyone other than your boyfriend. “Once you’ve talked about the jealousy with someone else, or even listened to yourself talk about it, it can help put the jealously into perspective,” says April Masini, author of Think & Date Like A Man . “If the jealousy stems from your own insecurity, you don’t want to demonstrate that to him.”

Trust Him.
All successful relationships are built on a foundation of trust. But sometimes it takes awhile for women to realize this.

“I realized I had to take control over the jealousy myself,” admits Meghann. “Over time, our relationship grew. Small things made me trust him along the way, like when he started writing poems about me, and gave me the password to his email without even thinking because I needed something in a hurry.”

So unless you have some sort of proof that he hasn’t been faithful—like lipstick found in the backseat of his car—it’s essential that you trust your partner. “Believe that you’re the right woman for him,” says Adele Testani, president and cofounder of HurryDate.com. “As much as you want to log into his email account to see who he is talking to, refrain. If you can’t trust him now, your relationship will not stand the test of time.