Common sayings for an anniversary include "I will not love you for the rest of your life, but for the rest of my life" and "If I had my life do over I would find you sooner so I could love you longer." Some more humorous quotes are "Being married is like a battle field. You have to prepare yourself for war. Happy anniversary though!" and "Here's to two imperfect pieces that fit together perfectly," notes brandongaille
Yourtango suggests that anniversary quotes are appropriate whether you've only been dating or been married for decades. Some quotes they recommend are "Real love stories never have endings," and "I still fall for you everyday."