How did you guys tell friends

Hi all. I have been struggling with an eating disorder for the past 6ish months, lots of up and downs of getting better and worse and so on and so forth, but anyways. I’m very bad about eating meals, and my therapist suggested I ask friends to help hold me accountable for my eating. However I haven’t told any of my friends about my issue, and they just think I’m a very health conscious ‘fit’ guy. I’m in my senior year and am a part of a close all guys group. I’m just not sure how to bring it up, considering it’s not really our normal vibe of conversation and frankly embarrassing. Any advice would be really appreciated.