My FWB broke it off, how do I make him regret it?

Basically we hooked up twice and then I asked him if he wanted to make it a set hook up thing and he blew me off. Obviously even that small commitment scared him off. I'm not Facebook friends with him and I don't want to text him but I do run into him on campus every once in awhile. How do I make him regret not choosing me?
My FWB broke it off, how do I make him regret it?
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