He can't tell her she's beautiful when she's not. I don't mean that as a dig, she's obviously not fugly or 'owt, but she's not beautiful. Maybe if he was falling for her she would be beautiful in his eyes, but nope.
She should think herself lucky, I went out with a bloke who told me he liked going out with me because I wasn't beautiful. Like, mate, fuck off. It would be called negging now, I guess. Anyway, I had self-esteem so I dumped him. Not because I thought I needed to be told that I was beautiful, but because no one should be told from out of nowhere that they're not beautiful. So, fair play to Shitlids. He could have gone there but he's kept his mouth shut. So far.