I think, to be fair, sometimes people are worried about saying something in case it is the wrong thing. I had someone come up to me the other day, hadn't seen her for ages, and she said "I want to say something about your weight loss, but I am a bit nervous about mentioning it". Turns out she had complimented someone on looking so slim a few weeks before and then discovered that the poor woman had been very ill which is why she had lost so much weight! So my friend was a bit wary, which was understandable.
And people here are right - there is so much nonsense talked about weight loss (and we have all heard it!) that the fact that it is possible to lose weight successfully on SW while stuffing our faces is a bit difficult for folks to understand.
I think we have to accept, too, that if we change our looks our friends are worried, whether they realise it or not, that we are going to change as people. Someone at our group was told by a friend that she was worried that she was going to be grumpy when she got thinner! People equate "fat" with "jolly", and they worry that they are going to lose their jolly friend and end up with a grumpy skinny one!
When a friend of mine lost a lot of weight (before I did) I was uncomfortable and slightly cross with her. I couldn't work out why, although I knew I was being unreasonable! I had to think long and hard about it before I realised that it was because I couldn't feel sorry for her any more! That sounds awful, and it IS awful, but I didn't realise I was doing it. Sometimes we use the problems and misfortunes of others to enable us to feel better about ourselves.
I had to be really, really honest with myself to understand what I had been doing and to stop doing it! I hope my friend didn't realise what was happening, and I hope that I gained enough insight to stop me doing it again.