Was this hurtful??? Diet and fittness?

Ok so at my school theres this big fat black girl named Melissa and shes been trying to lose weight for a few years but it has never worked for her no luck. Well no body says anything to her about her weight and she has friends but she has this horrible attitude to some really skinny people b/c she's so overweight for her age. Well anyways there's this really skinny white girl (not anorexic) named Jennifer she's friends with Melissa and the skinny girl Jennifer says infront of her to other people "I'm so fat my stomach has a discusting love handle i so need to get rid of this belly fat." Which she does not have and she knows it but she trys to make her fat friend Melissa feel bad b/c Melissa gives her attitudes and acts grumpy towards her making smart remarks. Also at lunch time Melissa her reguler lunch will be like 2 slices of pizza little chicken wings for the side and an orange with juice. While Jennifer eats a salad with veggies in it and apple wedges with carmel dip and water right in front of her on purpose saying "I have to watch my waistline." with a smile grin on her face. Is what Jennifer is doing hurtful to Melissa?