<human>: Condense the text into a few key points

She's been dating him for a year and a half, she is nearly 20 and he is nearly 23. When he gets angry because she's doing something he doesn't like, he publicly calls her a whore and other obscenities publicly on his and her facebook. Most recently, she wanted to go somewhere with me and because his friends happened to be going to the same place he threatened to put a sexual video of her up on facebook if she went. She broke down, cried, didn't go, and said she'd never go back to him.

Now she's been acting shady, she says she's single but his profile picture is romantic pictures of them. Last night we were hanging out and she decided to stay longer because she KNEW she'd been acting different, and she got a call from him, stepped outside, we heard her talking in a distressed voice and she came back in to say she had to leave. She looked like she was crying.

He controls everything she does, and now I think he's convincing her that we're bad friends. Our other best friend said she just can't move in with her at college like they planned because he's too much stress. He is now using that against us and I think convincing her to stay away from us. What do we do? How can we help her? How can we show her we're still the same we always her and it's him that's hurting her?
<bot>: best friend is in a controlling/emotionally abusive relationship and it's destroying her life. what can i do to help?