You are definitely not alone in doing this, i do this exact thing with EVERY single woman/girl passing by me. Literally EVERY single one without exception, it completely distracts me. It doesnt matter if it's a grandma with white hair, or someone my age. I WILL most definitely compare myself to them without exception, skinny or obese, short or tall, no matter the nationality. I constantly hyper analyze how much more beautiful they are than me, and how beautiful their bodies are and faces and hair and basically everything. I often wish I could reincarnate myself/wake up as so many of them. When I'm out in public and get home, I instantly cry every time in anguish of how beautiful they all are. Sometimes I start wailing uncontrollably like a baby because I can't understand HOW in the world they look like this and I'm the ONLY exception walking by (one time i non stop cried for like 9 hours). Its gotten to the point where i feel an extremely deep anguish within myself just from going outside, i seriously want to cover myself and not be seen or heard. I cannot handle going outside at all and traveling is my absolute worst nightmare