Thank you for your reply.
Regarding the Facebook question, although Facebook is a social network. The messages that were not only read but copied and saved into their computer. The private messages and was not a public post.
Also I would like to know about harassment, how can I sue someone for that? The person whom I want to sue has been harassing me for 3 months now through the Internet. She publicly post lies about me, it would have not bothered me but she posted and sent messages to people that I had an abortion which is not true and can be backed up with evidence and witnesses. She not only told my friends but the family of my current partner. She also mentioned that a warrant for arrest was issued on me, which again cannot be true because she is half way across the globe and there is no grounds for my arrest. She sends me threatening messages and I truly believe she is mentally disturbed. The only issue about it is she is the gf of my brother and they have children together. She threatens to take away the children. And she claims I have been harassing her through my private conversations with my BF and my family, which she read on my Facebook when she hacked it. Again, they were private conversations, not posted for the public eyes.
Thanks so much for the reply, and just so you know, your advice certainly would help a lot.
In addition, the she started publicly posting defamatory statements about me only his month. And continues to do so, can I sue?