I feel this song is about that he still has friends and wants more peace, judging by the line: "who needs enemies" and he still loves his girlfriend, and they have been together, or have known each other for a long time, according to "Pickin' apples in late Septmeber like we've done for years," while still keeping the cute element by saying as though it's a flashback when he mentions the glow-in-the-dark stars.