I recently found out that a girl that I turned down (she was interested in me), turned down a guy (as a boyfriend, he wanted to have her as a girlfriend and not just for sex) that is currently very interested in a girl that I am also very interested in.

The problem is that this girl is more interested in him then me.

One of the reasons is that she prefers guys with short hair and this guy has short hair.

The other girl turned down the same guy for the same reason, she prefers guys with long hair like I have.

The girl that i turned down doesn´t have a fraction of the sex appeal that the other girl has. The girls are not awhare of eachother though

Can I turn this into an attraction destroyer somehow so that the "hot girl" starts to become more attracted to me?

Maybe you are right but I spoke to the girl that I am not interested in on msn and I asked why she wasn´t interested in the other guy and she said "I don´t like his hair I love guys with long hair"

Maybe she just told me that to indicate that she likes me more then him.