Heard this on the radio, there are 5 languages of apology .

1. Expressing regret : To say "I am sorry." to the other person

2. Accepting responsibility: To say "I was wrong." Specifically mention what you did wrong.

3. Making restituition: To ask "What can I do to help you forgive me?" Let the other person decide what you can do, the action can be closely related how the other person feel love and appreciated.

4. Genuienely repenting: "I will try not to do it again and this is my plan for change." Make plan for changes together and make back up plan. If this is a addicted error then make plans with difference.

5. Requesting for forgivenes: "Will you forgive me?" Putting yourself at the mercy of the other person. Tips for the other person - you can choose to forgive and hand this matter to God or to continue to carry this burden on your shoulder. It is ok if you need time but do not let this eat you up. 

 You can read a preview of the book here , or even do an assessment .