It happened to me three times, once in middle school. The final time it happened to me was just before high school. I never quite felt like I managed to settle in to a group of friends in high school. It felt like I was "new" the whole time I was there. The trouble was that everyone else knew each other from middle and elementary school. I did start over with friends at my university but those people ended up being nowhere near me after we graduated. From what I can tell a lot of people never really left their friends from high school and kind of remain with these people through life but I don't really have any so I just have felt lacking for so long and wished I had that. But on the other hand I know it's not impossible to find new groups of friends.

I would definitely say the moves were very difficult. Leaving the old and the shock of not knowing anyone at a new school had a deep effect on me.