I think it's astonishing how people can give advice to a person (two people in this instance) who've known each other for ages and having what seems to be a difficult stage in their relationship, who they don't even know and even over internet but somehow think that their own relationship fears etc can somehow translate into being useful and not condescending or something.
Everyone's different and there are too many factors involved which socionics doesn't necessarily have to do with.
Say the person isn't providing enough effort or w/e, you can say it's because they are such and such a type, but if you're not happy with what they are doing, can't force the person to change.
So maybe you are looking for advice on how to make her "change", can't help you there speak to one of her pals or something.