I thought it was telling that in the telephone call with Alexis, Amber kept talking about how happy she was with Tommie, “don’t you want me to be happy,” etc. Never anything about Tommie herself.
Everything is all about Amber in her purest, most 13-year-old toddler self. She thinks she’s an adorable chubby girlypop obsessed with all the cute teenager things, including earreens, jurnaleen, and crushes, tee hee! Actually, she’s a case of arrested development with severe attachment issues due to early parental neglect. She is incapable of real love, but she gets dopamine hits from infatuation, so she is constantly seeking that new relationship smell, so to speak. She tends to lose weight in the early stages of a relationship, too, because the dopamine hits lessen her desire to binge.
Eventually the Limerence fades, the depression kicks in again, and as she seeks dopamine hits/self soothes with food, the weight piles on. She stops bathing, stops moving, somehow manages to become increasingly bitchy and unpleasant to be around, and eventually the partner bounces.
Amber‘s cycle is portrayed as attempts to start a diet, then fail, then start over again. It could just as easily be seen as her “love” patterns, as her relationships start off as the best thing that ever happened to her!!! and devolve into yet another breakup where the ex gets as far away as possible.
TLDR: Amber’s right; it’s not a weight loss channel. It’s an Amber’s love life channel. With an identical success rate.