my fiance is wiccan and he is married in his religion to someone what i am wondering is is it ok for him and i to get married even tho he is married in his religion to this other girl

Merry Meet Seeker,
Wicca is an established religion in many countries. A marriage by two people in the Wiccan tradition is certainly binding and permanent. I am not sure who your fiance is and why he is already married. It is up to you to find out more about this person before you “marry” him.
Just as in other religions, a marriage means the binding and loving relationship between two people who love each other and want to spend the rest of their life together. No one who does this will look for another bride for himself again unless he is mentally incapable of understanding what a marriage means. Or he could be just playing with you.
Anyway, do try to find out all about his background, education,illnesses, other relationships, etc. before you think of marrying him. If you are already his fiance, make sure you do the background work as soon as possible. Also, see a judge or official who will preside over your wedding and talk to him/her about this situation. Make sure that you go alone to see this official so that your “fiance” will not have a chance to pull wool over your eyes.
I am happy that you had the good sense to write on this forum. Please do take care of yourself and find out all about your fiance before you marry him.
Wishing you a very happy and successful marriage with a wonderful husband who will love you and you only.
Brightest Blessings
Rose.