Hey, this isn't possible sorry. I suggest the best thing to do is block your bullies and ex off facebook. Make your account private and only exclusive to a few friends.
If you need someone to chat with or help you lock down your facebook, feel free to email me at faisal.abid@gmail.com.
Bullying is tough but know that it's not the end of the world. There is no easy way out of it, but there are many ways to avoid it and start to get away from it.