How to become more petite?

I've been working out for a while now (6 months). I originally weighed 145 pounds and I'm now 140, but it's because I've gained a ton of muscle in addition to my fat loss. My legs are really muscular and I'm honestly not digging it. I really don't want to have so much muscle....I rather be slimmer instead of bulkier with muscle. I'm 5'5 and almost 17. I'm really curvy (as in hourglass shaped, not fat!) but I want to slim down instead of having a bunch of muscle. I still have a bit of belly fat that I need to lose, but I already know what I can change in my diet to improve that (such as cutting down on the sweets...) So can you tell me how I can become more petite instead of muscley....it's just my personal preference.