I born 8/ 23/ 1958, & my husband born 11/18/1955 we always fight n want to separate him what to do?

Yes, according to Chinese astrology, your pair will always quarrel. Your sign is a dog and your husband is a sheep. Dog is alway pessimistic, which made sheep hard to accepted, while sheep is very emotional and sensitive.
But I think you need to seek the other's advantages. For instance, dog will give back by providing security and protection.
If you still want to separate with him, just do it.