Wow! You've done really well! :)
Also remember that if you're exercising then there may be a point where you don't think you've lost much as you will start to gain muscle, and it weighs quite a bit more than fat. I've lost 4 1/2 stone in the last 21 months through exercise and diet mainly, and I've had a lot of ups and downs and been distracted,then had to push myself to keep to it but as long as you're focused on the end result then you should do it easily :)
Let's face it, that new wardrobe is pretty tempting! I've another 2 st to lose until I can treat myself to mine, but I've funded all my new size clothes by selling the larger sizes on Ebay, it's worked out fairly well. One day I may even be able to wear a bikini without thinking I'm being laughed at...*looks doubtful*
Keep it up! Good luck :)