A. You would need to undergo full brace treatment for this problem. This means fixed braces for up to 18 months. The gaps will close properly and woth permanent reatention they should stay closed. Now is the time for you to have braces as I am sure many of the people you go to school with also have them. If you have it done properly now you will not have to worry about it when you are older.
Ask you dentist to refer you to an orthodontist so that you can get all of your treatment options
Kind regards