Close friend of mine that i love as a brother have gotten into LTR.

He is being beta af with her,always letting her be right in arguments,rarely standing up to her,when he is at my place instead of chilling like we used to hes on the fucking phone texting her.It's even worse when we are outside hes walking and texting like a fucking retard.

He helped her get employed and moved to local country with her and her friends.And she has handfull of redflags.Worse oneitis i ever seen.I'm not trying to pull them apart i'm just trying to redpill him a little bit for his own good and not risk friendship.I'm just trying to explain to him that this shit of his can fall apart and that he will be devastated.

What should i do here how to minimize damage here becouse if he had to choose between her and anything else he would go with her.