The new bf of my ex that has an avo on me that used to be my friend and who I lived with has made a fake Instagram account and contacted me posing as her then I called him out on it .I also have seen him out one night and he was drunk and baiting me saying things like “ I’m f#@&ing your girl and you can’t do a thing about it, you can’t touch me or you’ll go back to jail”. What can I do about this