Hi Pam - First, hearty congratulations for doing something positive for yourself. You are right to ignore people who don't support your positive efforts. Years ago when I was "only" 80 pounds overweight, I would announce a new diet to my husband who would, without fail, bring donuts home within 72 hours. Now that I need to lose at least 150, I guess he got what he deserved.
Be very careful who you decide to give power to. Whenever I meet someone like that (and there are a few in my family too) I just play beauty queen: Smile and Wave, Gorgeous! Smile and Wave!