Most Helpful Guy
You are broken up with only a glimmer of hope that you could get back together. If you were on good terms and there was mutual love, you would not have broken up. Offering that promise that, maybe sometime in the future, you can get back together. . . that's just an old ruse for trying to let someone down slowly.
He has moved on. Maybe he added you on FB because he was feeling guilty and wanted to see how you were doing, but he doesn't want you seeing his friends list because he has moved on. . . and there's probably at least one new girl on that list.
You should be moving forward instead of wondering what is in his head. I know this is not what you want to hear, but I think it is what you need to hear. Accept the idea that you will never get back together and find someone new. If anything ever happens again between you two, okay (although the odds are that it probably wouldn't work out) but, in the meanwhile, do you want to turn into one of those old maids who wanders around town wearing the same dress you were wearing the last time you saw him?
Most Helpful Girl
You can't overthink this. Just go with the flow of things and don't get so caught up in it. He will do something when he's ready. You can't just wait around for it to happen. You gotta get out and be more interesting