vous aimez le vin français?
The above may also be worded in other ways: 1) Aimez-vous le vin français? - Literally: Like you French wine? 2) Est-ce que vous aimez le vin français? - Literally:...
This depends. If the boy often compliments girl's pictures, maybe not, but if you've never seen him call any other girl pretty then he probably means it.