Oh you need to talk with a psychologist they will help you feel better about wanting to be thin you should replace the word thin with healthy. Healthy is what let you live not thin
Everybody has a body type that is not changeable, but everybody looks better when they exercise. You can get slimmer, yes, but it will be all over weight loss. It starts at the top as far as being able to see the weight loss. Your face and neck show evidence of weight loss first. That means you are making progress, so keep working out and eating more veggies, no food that has low nutrition and high calories.