I need help ! I don’t know how to be 15

I’m a failure and I don’t know how my boy stays I don’t know how do be 15 I don’t know how to be what every one wants me to be I don’t know how to make my mom proud or my sister not hate me I don’t think I have made my mom proud I fucked up had sex at 15, I wasn’t eating for awhile ,I wanted to die .and my sister she brushes me off like the plans I make to hang with her don’t matter I just don’t want things to be like this I don’t dress the right way ,I don’t act the right ,I’m failing to be 15 I tried so hard I did every thing for them I stayed home to watch the kids I cooked and then I stopped and tried to act 15 .I do know I do have it easy i know others have it worse