What does a guy mean when he tells you that you're his fantasy girl?

Don't take offence at this answer, but:

Wow! Y'mean there are actually blokes out there that would REALLY say that to a girl?....Come off it! Not just one guy but "GUY'S!"

Now I don't doubt for a minute that you're a good looking lass, but Jeez! D'you not think for a minute that all he (and they!) want to do, is get into bed with you?

Then what? - they've had their fantasy fullfilled, and who'll be next on the list with the exact same line? Sorry, but I have to be very cynical with ANY bloke that would come out with that crap - and btw - I AM A BLOKE...and it's something I'd never say, even if totally drunk and full of bravado.

These blokes sound like complete losers and dreamers.

In my opinion you are the girl he has imagined. You are the perfect girl. When guys fantasize they probably think of looks and behavior and to these guys you've met you are the whole package. Some might have meant it as sexual and others might not have meant it like that, Just take it as a compliment and not as anything perverted. Just don't brag about it lol some people might take it out of content.

You're the girl they imagine while masturbating, but you're not a girl they'd ever date in real life. You're just a fantasy.

He really likes you and is surprise to find someone like you.

Or if he's a pervert listen to the previous poster.

probably both