There is a boatload of bad advice on this thread, and I hope I am not adding to it.
First of all, the initial post says her friend is a little overweight and a doctor has recommended lap band surgery. Either the poster is being kind in understating her friend’s obesity, or doctor making the recommendation is incompetent. Lap band surgery is for the morbidly obese, not the chubby.
Secondly, there are a lot of bad therapists, counsellors, coaches and other nominally licensed quasi-professionals, who are little more than yentas with portfolios. None of them are helpful unless they somehow encourage the chubby girl to lose weight. Weight Watchers or one of its reputable imitators is all the help a chubby girl needs if she wants to lose weight. And if she does not want to lose weight, she should accept herself for what she is.