Insecuritys😪😒

I'm having a REALLY hard time with loving myself.😒😒 yea my friends tell me I'm beautiful but I only think they say that to make me feel better. I have incredible low self esteem mainly about my body, I have a small chubby stomach, stretch marks on my stomach,arms, and sides that my cousins and friends always question me about like it's nasty.. I don't think I'm pretty. I have the face of a 12 year old that I absolutely HATE. I always have trouble with having a boyfriend because I feel like no one likes me, everyone thinks I'm ugly because I don't dress like the girls at my school and that I act like a (goody goody) Only thing I like about my body is my thighs. My sister on the other hand has a good loving boyfriend that she's been with since 7th grade (she's 17) she has a nice body, she's skinny and she's really pretty with and without makeup, all the boys at school think she's so cute and even on all her social media pages. She never has problems making friends too. Sometimes when she's mad at me she would say hurtful things like "that's why your fat" and "no one likes you" "your ugly". "I see why you don't have a boyfriend" "fatty" and all these other stuff. I act like those things don't hurt but all I wanna do it cry cause she might be right. Sometimes I feel cursed. Idek at times I would think about getting surgery when I grow up to fix the problem. I absolutely hate my body, my face my hair every thing I honestly don't know what to do any more.🙄😒💆🏾💆🏾