I'm an older woman, like I suspect you are, as I'm also starting to get bone issues. I lost 30 lbs in the last 6 months.
I'm assuming that you are already taking calcium with Vitamin D, and that you're on medication like fozamax or boniva.
My doctor also indicated that I needed to lose weight, and so I'm working on that. You know, we can only lose what we can - do the best you can, but don't let anyone discourage you, or tell you you haven't lost enough.
Many of us on this site find that as we get older, losing .5 to 1 lb per week is about all we can lose, but in a year, we'll have lost between 25 and 50 pounds!
I'm assuming that you know about weight-bearing exercise, and are working on that. Since I have very bad knees, I do a lot of my cardio in the water (water aerobics, and swimming), and lift weights and do light walking on land.
You may want to join some of the support groups for 50+ ers, and make friends with some of the people there, I know that my support groupers are really important in keeping me off track.
Proud to be Krista's Mom