say things you can't go wrong with; attributes that she tries to display on a daily basis.. like if she tries to get across the point that she is loyal, sincere, kind, generous, honest, anything like that. and tell her that her being beautiful doesn't hurt either.
Tell her what you really want in your relationship. She's just trying to make sure she doesn't get hurt. Let her know how you feel about her and be honest. You'll make her happy if you tell her how you feel and let her know that you want to be with her. Just make sure not to make things up because that's really not worth it in the long run.