Is it normal that i love to smell my gf breath during sex?

Well breath is warm, the feeling of it against the skin can make a person tingle, and one's usually attracted to the person behind it, so yeah, it's normal.

my wife and i rebreath the same air over and over till we almost pass out and she cums and i ejaculate in her at the same time. its awsum and flirting with death , i dont know how we got started doing it i guess it's like that choking game. all i know is it make intense orgasms almost blacking out.

Yes... The breath of a loved one is beautiful.