Sexual drive can not be erased. It is part of the human mental nature. In animals, the sexual drive has only one purpose-reproduction for continuing a species. For humans, sex drive means much more than simple reproduction. For us, satisfying our sex drives usually brings with it pleasure and mental relaxation. And on the opposite side of the scale, not satisfying a sexual drive can lead to frustration, disappointment and mental disorder (anxiety).
It is not clear from your letter why do you want to erase your sexual drive. Are you satisfied or not from your sexual life? If you have some problems in satisfying the sexual drive you might try to solve those problems it seems that you might be disappointed in sex and/or women and can explore these considerations further with the help of a counselor or psychotherapist.