losing sense of identity/validity while gaining weight

i guess just what the title says. after a year of struggling to gain weight i have been steadily gaining for the past few months, to the point where it's fairly predictable and i'm getting used to seeing the scale go up. i'm getting to a point now where i will no longer meet the weight criteria for AN and it's surprisingly difficult. i know this is a part of recovery, i know that some people have AN without ever being below that weight threshold at all. but in my disorder, i always had such a secret sense of pride about being very underweight. when a lot of other things made me feel like a "fake" anorexic, having a low weight gave me the feeling that my struggle was a real one. now that i'm not going to have an "anorexic bmi" i feel like i'm losing a part of myself. does anyone have advice for this? it's really hard.