I've battled an eating disorder since 12. I absolutely needed a specialist because they were all clueless idiots when it came to this aspect.

PM me and I'll see if any resources I suggest may be of any help/use to you. Hopefully they'll also assist in you in how your therapist can better help you in this aspect.

Otherwise the suggestion to maybe find a group is a good one if social situations like that aren't difficult for you.