I don't care about my friend's significant other
Is there something wrong with her?
He just uses her as a money-making machine and doesn't take care of her at all. It's terrible.
You should be nice to your friend and try to care about their partner. They make them happy, so you should be respectful of that.
Wtf man I can't care about something I don't like.
I can understand how frustrating it might be to watch him use her. Have you considered telling her about it? I mean you can also just stay out of it.