A lot of people try and fail at dieting and I also think a lot of friends secretly enjoy having a fat friend around so they feel skinny in comparison (this may just be paranoia that comes from always being the fat friend). The point is, there are some reasons that people may not want you to get too skinny (jealousy), but there are also just some people whose eyes are clouded by love and honestly can't see that a friend is overweight and therefore doesn't think anything needs to be done.
Just my two cents.


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