I know what you're beautiful means, but just wondering if you're sitting having a conversation with someone whos not your boyfriend, who all of a sudden says this to you, even if he's flirted with you before.
Most Helpful Guy
It probably means he's admiring you through the entire conversation, then just blurts it out. My guess is that it's more than just looks, that he also likes what you are saying and admires you all the way around. (he's probably really into you) Look for other signals.1