Facebook problem, please help?

I have somewhat of a problem on facebook, I have my snitch aunt as a friend on there, and i'm 17, and i have a child.But she still continues to try to run my Facebook life, i'm not posting bad things on there or anything, it just really annoys me when she comments on everything. she also trys to make something that sounds good, make it bad. I would like to post whatever i want on facebook without her seeing it, but i would still like to have her as a friend, is there anyway, i can block her from seeing my posts & commenting but still have her as a friend?