Going out to make a guy jealous is not only very immature but can backfire on you quite badly.
If this is the bloke you posted about copiously before, may I suggest you just let this run it's natural course.
Also, I suspect no bloke is going to tell you what makes him jealous if he thinks you're going to use it to aggrivate another bloke... I think it goes against the bloke club rules or something, it's definiately in a rule book somewhere, I read it.