how does one get over the constant sadness when being “ugly”?

hi all! i want to start off by saying that this post is in no way me trying to seek attention. i’m writing this to simply get help, because this is something i know i’ve been struggling with for many years, and no amount of reassurance has helped me, i need actual advice please.

how does one stop feeling “ugly”? i have tried so hard to get over the fact that i am ugly, i know it’s an insecurity but it’s one that has stayed with me for years and i don’t know how to stop feeling this way. i have tried so many skincare treatments(my acne won’t go away), i have done so much hair care products (my hair is dry, thin, and greasy), i have somewhat small teeth that make it awkward when i smile, i have a giant forehead, with wrinkles (i’m only 17 years old.) and i have horrible eyebrows, and i’m not skinny. my friends and family reassure me that i am not ugly, but i feel like they just say that because they love me; not that this is a bad thing it just isn’t very helpful. i know it could just be the age i am, but i don’t want to blame this constant feeling on an age, i want to find the root of the problem and fix it. i just don’t think cosmetics can fix it because i’ve tried so many and i still feel the same way.

i know this sounds like i am seeking attention, i just want help. this has affected me since i was young and it doesn’t help that i come from a family of beautiful women, and all of my friends are extremely beautiful. i just want help on how to get over this, i want to be comfortable in my own body, and i don’t know where to start. thank you all, have an amazing day/night to whoever is reading. :)