If you are in a committed relationship, the most difficult thing to accomplish is training yourself and your significant other to temper your interactions. If you lack self-control in this area, ask the other person to do the tempering.
Relationships will have a much more sturdy and solid foundation if you begin to inject temperance. Otherwise, when you are living together as man and wife, the natural temperance that occurs at the beginning of every relationship as newlyweds will interject fear into the relationship. The Lord God Almighty is a God of temperance.