How do you hide friends on facebook indefinitely?

[Jay]

So I have this ex girlfriend who watches my list by making fake accounts, pressing add friend, cancelling, yet still seeing all my friends as suggested friends. On my account I have my friends set to only me, but I know she can see them through suggested friends as she has named off people on my list. I just am not trying to get a rise out of her from the friends on my list she doesn't know and don't need the accusations. I do not know her name on the fake account/s either so its not like i could just block her... Am i stuck here having to worry about her messaging my friends saying rude things or is there a way to stop her from seeing?