Diamond, you're not the only one who feels this way.
I have a waif body as well, but I'm underweight being around 120 for a height of 5ft 10in.
I've had comments given to me saying I should be a model, but I was also berated by society, mostly men saying that I was "anorexic-looking", being called a "walking stick". I too despise the way I look and desire to have a curvier sexier body, just so I can be excepted as attractive in everyday life.
And yes, it is always hard trying find the right shirt or dress that fits your shape.
I also have many health issues, but they prevent me from gaining weight. I wish you luck in trying to earn the body you desire to have.