insecure about body :(

I’m 15 and i reallt hate my body so much. i have the smallest chest. literally 34 AA and they are not gonna grow at all. i’m so tired of have a small body and no boobs and no butt. i see all the girls on social media having a good body and i just want it like that. my boyfriend cheated on me 2 times and he would call girls hot and pretty and it makes me feel worse about my self. he says he loves my body but it’s a lie i know. but my friend always points out that i have no ass and no boobs and she says things. i just feel so ugly and not good enough. i feel like i’m no where near the beauty standard.