I think your decision to take a step back is the best one for you right now. People deal with situations differently and I believe you know what is best for you. So walk away for awhile and only surround yourself with those that give you the love and support you deserve. It's hard because it is family but it may be the wake up call they deserve, and if it doesn't wake them up then you are a stronger person for the experience.
Hope you feel better soon!