Help with controlling bf

A close friend is recently having trouble with her boyfriend. He neglects her and spends every day with his mates rather than talking to her even when she’s upset or in a low mood. He just brushes it off. She mentioned to him that she may be depressed and he got angry at her and said that she can’t be. She tried to speak to him about their lack of communication but he gets angry at that too as he sees their relationship as perfect on his side. There’s so many red flags with him and I don’t know what advise to give her besides that she should leave...

I know that they love each other but I feel that he is way too controlling to her so what advice can I offer her?