Most Helpful Guys
I don't think it's only guys who judge on the basis of looks. This habit is gender independent. Girls do that too.
In your case, it seems like he just wants you to be a bit more attractive to him. I mean it maybe selfish on his part if it is too hard for you to pull it off. He wants to keep the attraction alive.
Most Helpful Girl
My thought of what to tell him wouldn't be very nice.
Let's just say it's time to find a new boy Ms JP :)
I think this one has seen his better days.
Find a boy that will love you for who you are, not who he wants you to be.