Don't you just love how people with no photos or profile info seem to insult the most. Calling the OP a chunk is not called for.
As for height and weight. I have met people our height, that certainly have twinkish bodies, about 5'4" and 110-115lbs.
I'm just shy of 5'5", and 180 myself, though fairly muscular now, which is a big part of my weight, I wasn't always like this. After I graduated high school, a slowly gained weight until I was 22, and got up to about 185lbs, with a 37" waist. I then decided it was time to lose the fat. In about 4 months time i dropped down to 132lbs, and a 31" waist. To do that, I drastically changed my diet, not starvation, but cut out fast food and soda, also cut out most processed foods, and watched my portions, also did over an hour of intense cardio every day. After I lost all the fat, I gained a little muscle, took me up to about 145lbs, and stayed there for about 5 years before I decided to do some bodybuilding.
I'm meso-endomorph, which does make it difficult for me to burn fat, but also makes gaining muscle, and keeping it, easier. Just saying, it is possible for you to cut a lot of fat, and stay healthy, if you have the discipline and know how to do it right. Talk to a nutritionist, and a trainer to get you on right path.