My boss added me on FB, is this a bad idea?

[NeNe]

My boss at work added me on facebook. Problem is, I am an avid FB'er and I have it on my phone which leaves me signed in all day. My boss is the type to confont me if she sees that my status is on there, I hate I accepted her now and am now re thinking the decsion to have her on there, if I delete her, she will know. Lately other co -workers have mentioned regretting adding her also, b/c info has been used against some. My boss and I go back about 10 years when we worked for another company and we were in the same postion so we did sort of have a friendship. I also use FB for networking, and as a single mother to check on my children through the say since my job does not allow me accsess to a phone. I fb on breaks and lunch as I am unable to pull out my phone in front of a patient and check it. What do you think about this ugley situation