Why are people so threatened by success? Because they are afraid that you are going to judge them and hold them to the same standard that you judge yourself by. Because they are afraid that they might actually be expected to move out of their comfort zone, and give up some of their security blankets like pity, drugs, excuses or other coping mechanisms. Because if they are going to fail, they want company, they don't want to be left behind all alone.
I have heard to much negativity in the past few months, it's just unreal. Some of it comes right out of left field, from people who I'd least expect it from. Fortunately, I'm able to see that it's only a reflection of their own insecurities, and has nothing to do with me personally. I'm very proud that I've become strong enough to realize that and not give up.
When I first started this diet, a friend told me "You look fine just the way you are." (That's nice, I get that a lot.) 22 pounds later, the SAME friend, when I tell her I went from a size 14 to a size 12, says "Well, at your height you shouldn't be more than a 10." WTF? I feel scrawny and unhealthy at a size 10, and I'm quite happy at a 12. This friend had lap band surgery, lost 100 pounds, and gained it all back within two years.
I could go on, but I'm sure that anyone who's tried to undertake anything challenging can tell similar stories. It doesn't matter if you want to move to Europe, open a new business, or remodel your house, someone, somewhere, is going to be threatened by it. They are going to NEED to give you negative feedback because the very survival of their self identity depends on it.
Try not to judge them for being negative. Most people don't even realize when they are doing it (I'm just worried about you.) or they don't know why they are doing it. It's like explaining water to a fish, so don't bother. It will only make things worse. Just take their comments and treat it as their concern for you, and leave it at that.
Now, once in a rare while you will find a really emotionally healthy friend or partner who "gets it", and will be your cheerleader and support. CLING to them and tell them how much you appreciate them. They are worth more than all the gold in the world and you can trust them with your life because you know that their concern for you is coming from a positive, selfless place.
Sometimes you may have to go to an online support group, because people who know you and have to see you in real life can't be as objective, and are more easily threatened. Online people are every bit as valid and valuable as allies, and you should nurture those relationships just as much as if you were sitting over a cup of real coffee with them.
If you're going to try the HCG Protocol, this group is really, really wonderful. http://hcgdietinfo.com/hcgvanillaforum/