Ok, so just now I got on minecraft to play with my friend who just got his account today, and he requested to join my island, I accepted it so he and I could be on my island. Then it took me and him to a NEW ISLAND. PLEASE help I had a butt ton of god items and even 2 dia. PLEASE HELP ME!!!!
We're you the coop leader of your old island? - If not the coop leader may have kicked you from the coop.
Oh... wait he sent you a request and you accepted it? The only coop joining command is /coop invite (username) This command requests that a player join your island, not that you join theirs. If you did /coop accept, you joined his island. I believe there's some differences between net and org, but I do believe that this might mean that your island has been deleted or at least disowned. Were there other members on the island, or just you? Also, sorry if I'm right and you've joined his island instead of the other way around, as you wanted.
You accepted his coop request. If you wanted him to join you, you needed to send the coop request. With the island you lost, were you in a coop? Because then the island will still be there and your coop can readd you to the island. Unfortunately we cannot possibly refund items without any proof of owning them, however some nice people may refund you some items. I see you in game, I will give you some stuff, just make sure you start on a new island
If what the above mods said is true, that's really unfortunate... If you can't get your items refunded, I'll help you out as much as I can, in terms of lost items.