Revenge can become a grave for both.
I agree that it really won't make you feel much better if you get some revenge. We can all understand the need to lash out and somehow get back at someone who hurts us. Especially when the pain is fresh in our minds, like it is for you right now. I suppose telling him that he is not good looking enough for you, would be a small victory, if it hurt his pride. You are not going to be able to equal the hurt that he has caused you, but you know that. It might be kind of fun to string him along for a while and be very flirty with him and then drop the bomb that you are moving on to a more successful guy or a better looking one.
I would not recommend trying to get any sort of revenge because it's very childish and I also don't think it will make you feel better, nor do I think it will bother the guy as much as you would like because I'll bet he dates a bunch of women.
That's a funny cartoon--why don't you find one on what women can do to stop men from thinking of them as just friends?