Are your friends heavy? If so, you may be seeing jealousy rearing its ugly head. Are your friends skinny? If so, they may be jealous that you "cheated" and took the "easy way" to lose weight without going through enough of a "struggle".
People in general are change-adverse. You have changed in a major way. They need to recalibrate what they see in terms of themselves. Does your weight loss threaten a heavy person by telling her that she, too, could succeed if she would only do what terrifies her.
You have worked your butt off to work your butt off. They haven't seen it, so it seems like you did it effortlessly, and that's just
wrong for some people. It's like you got a free pass and never
earned it. (Whatever the heck that means!!

)
Be patient with them. You are finding out the depth of your relationship and where you are now. Some will disappear quietly from your life. Others will tell you just exactly what they think in leaving. Let them go. If they are that shallow, they should mean nothing to you. You did this to meet
your expectations, and to improve
your life, not theirs. It's sad to see this happen, but sadly, it's not at all unusual.
I am so glad your husband isn't one of them. Treasure him. Not all husbands can handle the stresses.
Congratulations on your success so far, and on your successes to come!
CT