When navigating a breakup, jealousy is a common emotion that arises from lingering attachment. To elicit jealousy in an ex, engage in activities that showcase your attractiveness, independence, and happiness. Flaunt your accomplishments, spend time with friends, and pursue new hobbies or interests. Maintain a positive and confident demeanor, making it clear that you’re thriving without them. Indirectly let them know about your social engagements and successes, but avoid direct attempts to provoke jealousy, as it can be perceived as manipulative. Remember, the most effective way to make your ex jealous is to focus on your own well-being and live a fulfilling life, demonstrating that you’ve moved on.