Embrace it! You are going to look gorgeous as those bones begin to show. And, bonus, you probably will not have to weigh as little as you think to look fantastic. Don't think of it as "big boned" -- it is more like a bigger frame. It probably means you have nice musculature under there to support those bones. I am 5'7" and I have the same sort of thing going on. By the time I weight 155 or so, I look pretty darn good -- and I have really nice lean muscle mass too...probably to support the bones. I always shock the nurse at my doctor's office who inevitably starts her scale WAY farther down when she weighs me, and then works her way up. She can never believe I weigh as much as I do. Last time I was there, she made me go step on a different scale in the office even though I told her the first one was right.
Have no fear, you will look absolutely fine. Maybe not fragile and waif-like, but, um, you are 5'10" so that is pretty much out anyway. Think athletic, strong and sexy.
