Most Helpful Girl
It sounds like maybe he really wasn't ok with having a long-distance relationship, after all. Maybe he thought he was for all those months, but then he realized that he really wasn't.
As for getting over a break-up that blindsided you, it certainly is tough. I think just meeting new people and spending as much time with your friends and trying to have fun is good to do after any breakup. Just find something else to focus on (like school or work, stuff like that) to keep your mind off of him as much as possible :)