I'm sorry this has happened to you. How good were your friends to start with if they can be turned so quickly? You could make new friends or try to change the relationship with your old friends. If you decide to do that, stay positive and bubbly. Approach the 'weakest link'...the one person you think you'll get the furthest with and start rebuilding. Show them you're the same bubbly, loving person you always were. Once you're back in their good graces try to find out why everybody turned and address it from there. Good luck and I wish you the very best.