Same chapter..Its killing me slowly. Loving yourself is a survival others fake hype won't do a damn thing!

I've been getting compared and I'm tired of it. My auntie nor mom, dad, brothers, uncle, almost everyone compares me to my cousin ever since I was 8 years old. Why can't parents or other family members understand that comparing someone else to me makes me insecure and lowers my confidence? It ain't funny when you compare me to him. I don't have his life, I'm not him. I met a friend who kept comforting me but then he was fake it broke me. Everytime I think about how he left me crying and running after him, I realized I'm still on the same chapter.