Grandma or Dad? Stuck in the Middle!

for eight years I have lived with my dad and my stepmother buT me and my stepmother have argued all the time we would say VERY VERY hateful things to each other like "if you weren't in my life it would be a whole lot better" or "the next time you talk to me like that I am going to slap you so hard your face is going to fall off". so yeah you get the picture, but anyways I Finally told my dad these things and I told him how I felt. I told him I wasnt happy with her. so him me and my grandma talked so my grandma said I would always be welcome in her home so my dad said I could go live with her.I know some people think it's an easy choice but it really isn't cuz I really can't chose between my dad and grandma. If I leave I will break my dad's heart and miss my life here that has taken me eight years to build.if I stay I will be unhappy and break my grandma's heart but i could start fresh new life. Advice much appreciated.

thanks Bob and I am 12 turning 13 soon. I appreciate that you took the time to post an answer.

thanks Bob and I am 12 turning 13 soon. I appreciate that you took the time to post an answer.

the longer you stay in a heated enviroment the longer the tension biulds up and someone is bound to explode.....
i hope i helped
take care
Scooby