Hey Rik,
I have chastised my guy for not having enough of a hair fetish sometimes so know that there area all kinds of women out there. If all you really do think about is hair, or even a lot of the time, she deserves to make an informed decision about her comfort with that. Be fully yourself and you will be truthful to your partner but at the same time repect their wishes if they feel you are focusing too much on their hair. They might not be the right date for you. Besides, you may later meet women not interested in a relationship but merely using you for sex and find it works well for both of you. There are a lot of options out there so take heart.
Elizabeth