for the guys-what is the worst thing a girl can do to turn you off?

I think that the worst thing a girl could do to turn me off is to be jealous and ask me a lot of questions about my social life. I hate it when a girl is insecure and asks me for a lot of reassurance. I am a warm and friendly man, so I do not understand why someone would continually doubt themselves in front of me like that, asking how they look and asking for constant support. I can only do so much, so I hate that.