You surely would not have come to the fantasy island if not tricked into this. This probably must be the worst prank that your friends must have played on you. However, it is not certain that your friends have done this intentionally. Anyways, all these things do not matter in any way. The only thing that matters at the moment is the way to escape from the fantasy island. You should go around exploring the island and hopefully you will find things that can be of use to you. You can use them to solve the puzzles in order to escape from the island.