My life, it's messed up

Hi I'm Vanessa I'm 12 I'm in grade 7
So here it goes I live with my grandma her name it barb, I still see my parents there names are Preston and Tanya. The reason why I live with my grandma is because my mom was 16 when she got Prego. I'm ok thought I just think sometimes it is was different if I was like all the other kids, cause they all live with there parents, but that's ok, my mom (Tanya) wants me to live with her now that I'm 12 and all but my grandma is like " well I raised her all her life, but now you want her" I think just cause I'm 12 she wants me she says its easier to take care of me now, but I'm not sure if I want to even think about that, but I'm going to have to think fast cause she is coming to pick me up for the weekend tomorrow every second weekend I see her, today it's March.5.2015 time 11:32 pm well I'm not sure what to do I just have to think....