Communicate: Talk about things, the good and bad. Build trusts. Be honest. Be faithful. Be there for one another. Make time for one another. Leave the past to the past, which include ex's. Well, what past is past. Knowing that having arguments are normal. Know that you won't always be happy. Don't expect change. APPRECIATE the flaws. APPRECIATE each other. Become best friends. Lastly, love each other unconditionally.