((((((((Donut)))))))) I hear it and it all sounds too familiar. First dear, I can only echo the others. They will never stop needing you, just how they need you will change.
Second, the bully will continue unil you somehow make it not worth her while to continue. Either make it boring or threatening. No, not necessarily "Make my day" threatening (though it does sound kind of interesting right now for me, says something about my state of mind!) but definitely not in her interest to continue. either because it will make her look bad or will result in action from a boss or others, etc. Since you know your work place, that will have to be up to you to explore those options. I really wish I could drop over and just hang out, maybe help with the house some. It goes easier when one doesn't have to do it alone. HUGGGGSSSSS!