make something better

i was a childish girl before i was an innocent girl i was smart enough and funny girl not to brag but it just shows you who i was before now i'm a liar i'm a betrayer really,i hate myself now what must i do now? sorry,i dont give my best mark again to you, parents now i'm just a lazy girl not smart and i'm meaningless i wanna change ............ gimme a change God :')