My friend refuses to leave her toxic relationship

DEAR ABBY: My best friend, “Brooke,” started dating a man, “Angus,” last year. From the start, he made a poor impression. He met Brooke while he was dating another woman but didn’t tell Brooke about her. Brooke continued hanging out with him only after he broke up with his girlfriend. 

The past few months have been nothing short of awful. I see Brooke weekly for coffee, and all she does is tell me how mean Angus is to her and her family. He calls her names, emotionally manipulates her, tells her what she can and cannot wear and looks through every inch of her phone. 

Her family loathes him. Her dad told me he never wants to see him again. They are constantly urging Brooke to end the relationship. None of her friends likes him, and she doesn’t seem to either, but will not, for whatever reason, break up with him.