My friend is whipped in an unhealthy relationship, advice?

I think your friend, needs to not be with this girl honestly she sounds wayy too controlling (like she's got him on a leash or something) he's always giving into her demands that's no good, who wears the pants in the relationship? well obviously not him. She should not always think about HER she should think about HIM too. Why does he keep putting himself through this torture? You and your friends should tell him how unhealthy this relationship is and hope he takes the advice, I have a friend who's in and out of a relationship that is very unhealthy, and I'm still trying to help her out.