Sando, it isn't that uncommon for girls not to give their men compliments on looks that often. I believe those reasons to be:
1.) Women simply don't value outward appearances as much as men do
2.) They expect a man to show enough confidence not to require constant gratification
I need to remind you the most IMPORTANT lesson of all and that is 'talk is cheap'. Anyone girl could say that to you and never have to prove it let alone really mean it, right?
So, I don't know you or your situation with this girl, but I ask you simply, does this girl yearn for you sexually? I'm willing to bet that she does.
Now, do you think she would do that if she WASN'T physically attracted to you? Hmmmmm....Think about that.
You see, it is nice to hear those things once in awhile from your girl, but you can't force it out of her. What meaning does it have if she isn't sincerely saying it out of free will, right?
Remember, your the man. It is your job to compliment her on her looks....but only occasionally though, don't go overboard
Giving each other compliments 
