I'm not in your situation, but I think you shouldn't let your family hold you back from doing what you need to do. If at some point you decide to come out to them, fine. But if you think you are better off without contact with them then just do that.
We have no choice as to which family we are born into, just as we have no choice as to which body we are born into. If in your best judgement associating with your family will not help you in any way, just get on with your life. Often our family of choice is much better for us than is our family of chance.
*hugs*
Kate