I'm 13 going on 14 i want 2 have sex with my bf?

i'm 13 going 2 be 14 i want 2 have sex with my bf well he is going 2 be my stepbrother but he is not yt he was 2 have sex with me 2 he ask me what age or if i will do it when i'm at my mom house i did not tell hem yt but i want 2 so bad he did have a gf but broke up with he cause he loved me and i will have 2 sleep in his room at my moms so he maybe will have sex this sommer