Hello thundathighs: I noticed this is your first post here on PC. So... welcome to PsychCentral.
One thing you didn't mention is how old your bf is. This may or may not be significant. But having been a young man myself once-upon-a-time, I can tell you I doubt there can be much of anything quite as unsympathetic as a young man. (Some older men aren't any better either. But at least some of us do begin to "get it" as we age.)

So no... I don't think you're asking too much at all. But it may simply be that what you are hoping for from your bf is just something he's not wired to provide. At least not at this stage of his life (depending on how old he is.) At least this would be my thinking with regard to the situation you've described.
One additional forum, here on PC, that may be of interest would be the relationships & communication forum. Here's a link:
https://forums.psychcentral.com/rela...communication/
The greater question here, though, may be... what are you doing to address what sounds like a serious eating disorder? You didn't mention anything about that. Hopefully you're seeing a therapist. Perhaps you're participating in, or at least considering the possibility of becoming involved with, an eating disorders program. At least from my perspective, it's certainly fine & appropriate to expect to receive support from your bf. But ultimately you are the one who has to do what needs to be done to heal. Here are links to some articles, from PsychCentral's archives, on the subject of eating disorders:
Eating Disorders - Overview of Symptoms & Treatments
Treatment & Management of Eating Disorders
Full Recovery from Eating Disorders is Possible: Q&A with Shannon Kopp | Weightless
Eating Disorders: Articles Resources
| Psych Central
Eating Disorders Resources
| Psych Central
https://psychcentral.com/quizzes/eating-attitudes-test/
I hope you find PC to be of benefit.