That 25-year-old boyfriend you adore? The one who makes all the decisions for your 21-year-old cousin? The one who shares "his advice about different issues" in her life? He sounds like an abuser.

Being aggressive in a relationship is a huge red flag, especially when combined with being controlling. My guess is he also has all her passwords, doesn't let her go out with friends, and frequently checks her social media, if she's even allowed to have social media.

Frankly, this "article" is gaslighting 101 and it made me physically ill to read.