Do guys like cold hearted bitches?

I'm not mean(I'm actually really nice), but I put up a front you know like trying to protect my heart. A lot of guys have insulted me in the past because I "rejected" them and I never said a word to them. Apparently I have this look which I'm not aware of that says "you are not good enough for me." I've not been in very many relationships but all of them ended really well. I've just seen all my friends get repeatedly burned by guys, so I'm what you call the scary cat. Is this a good strategy? I don't put out easily either. Do you think I'll weed out the chaff by putting up a front?
Do guys like cold hearted bitches?
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