My iPad 3 is hacked

TThere is no doubt in my or my roommates mind that my iPad has been hacked. There is some sort of keystroke program that follows my every move. The person I suspect someone I met in a fb group on health years ago from Fredericia Denmark and became close friends with. He reads my emails, listens in on my private conversations at home and has even taken pictures of me and my roommate inside our home That he has posted publicly in many of his Facebook pages he runs. He has hundreds of fake profiles on fb and runs hundreds of pages with art, fashion, poetry , political stuff and more. He uses people's images he finds publicly, photoshops them and creates scenes with them. He has without a doubt gotten private pictures inside my home several times over the years. I'm not sure what to do besides throw my iPad away? Does anyone have any suggestions? I flew to Thailand to meet this person, was there less than 48 hours before I left. There is a slight chance he had acess to the iPad then but this spying has been going on for years before I ever met him I know for a fact. The iPad was never jail broken by me. There is something called null in the settings under usage and under settings on the left hand side where all the others apps are listed. I am wondering if this is attached to a picture I saved or if he is just good enough to hack me remotely?