How to make an ex boyfriend jealous when he has a new girlfriend?

Anonymous
what are someways I can try to make my ex boyfriend jealous and regret the decision of dumping me and that his new girlfriend doesn't stand a chance?

we no longer are in contact...because he dumped me ..it was a very bad break up..soon after 2-3 months he started dating this new girl...is there a way I can make him jealous? I have tried no contact and started being happy working out ..but nothing seems to work or get his attention...:( I feel like I need a closure..its really hard for me to actually move on...what can I do to make him jealous and regret his decision that he made ?
How to make an ex boyfriend jealous when he has a new girlfriend?
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