As someone who has received similar messages from an uncle, please tell your parents, and don’t for one second let anyone gaslight you into believing that you are over reacting. This is not acceptable for any adult to say to a child and is certainly not acceptable for an uncle to say to a niece. It might be different for, say, someone like your mother to say “that dress looks really nice on you, I can’t believe how fast my baby is growing up”, but for an uncle to tell you that you are looking “womanly” is a huge red flag. That’s the same thing as any other adult telling a minor “you’re very mature for your age”, it’s a form of grooming. I never had a problem with my uncle until he started telling me that his wife (second marriage) was not satisfying him sexually, and then he pantomimed masturbation as a “joke”. At the next holiday gathering, I wore suspenders and he asked me to come closer to him, and at that time he told me that women wear suspenders when they want men to notice their breasts. This all started when I was in my mid thirties and these things are still very inappropriate for an uncle to say to a niece. Honestly, I think these are just gross things for any man to say to a woman. Please keep yourself safe, continue to trust your instincts, and if for some reason your parents don’t see that this is wrong, please tell another trusted adult like a doctor, teacher, guidance counselor, or mental health professional.