What you have described is commonly referred to as foot fetish. A fetish is a fixation on an inanimate object or body part that is not primarily sexual in nature. There is a compulsive need to use the object in order to gain sexual gratification.
A foot fetish is one of the more common fetishes. There are many males, like yourself who find women's feet extremely arousing. As long as your partner gives her permission then she will not mind if you worship her feet. In fact, many women enjoy having their feet massaged.
If you reveal that you have such a fetish too early in the relationship, you may turn your partner off. She may feel that you care more about a certain part of her body, than who she is.
Some people may find your sexual fixation unusual and make negative comments. As long as both partners are agreeable and no one is getting hurt, then you have nothing to worry about.
If your foot fetish begins to prevent you from having normal relationships, then you may want to consult a professional therapist for assistance. If this happens and you feel you need help and live in northern New Jersey, you could call the Access Center from Atlantic Behavioral Health at 888.247.1400 for an appointment.