Hi,
Your boyfriend is trying to tell you in a kidding way to change the way you dress, the way you fix your hair etc. Ask him some suggestions to improve these things he criticizes you about. That is if you really want to keep him.
On the other hand, do you think that he should take you as you are? This is your personality and he already knew this before. If you insist that he should take you as you are, then this man seems not the right man for you because he's trying to mold you into a different person.
The decision is yours. If you can tolerate his criticisms about how you look, then stay with him, if not, then find someone who will value you as you are.