I'm personalizing a locket, what phrase should I pick to personalize it with?

My best friend is moving to the other side of the country, so I've decided to personalize a locket for her. Instead of using the cliche "Best Friends Forever" I've decided to go for something different... but equally sappy. I'm trying to decide whether to use "Remember Me" or "Forget Me Not" on it? Which one do you think is better? I'm also up to any ideas! Thanks.