I'm about the same height as you and 60kg is my goal. (55 would be a treat) but I'm happy with 60. when I used to be 63 I was a size 10 so I agree with the others I think you just want to eat healthy and drink lots of water.
As you are about the right weight for your height maybe you should consider that you may not appear to loose weight so much as start to do some major toning. You may now see a better result in measurements rather than on the scales iykwim