Would you tell a friend that....?

Her boyfriend is manipulating and controlling her by some of his actions or not. I'm leaning towards no, because I think she needs to see if for herself. If she & I want to go do anything he kicks up such a temper tantrum that she won't go anywhere or if she does he calls her so much she gives up & comes back to the apartment. He's jealous of her friendship with me, & others she's already told me this, he's jealous of her relationship with her kids & when she gives them attention & he admittedly has said himself he's jealous of her DOG!!! He keeps manipulating her away from all of her friends & has run so many others off I don't want to give him the satisfaction, but at the same time, it seems to be working with her, because if he's there she won't talk to me on the phone anylonger.