Divorcing and custody.

So my husband and I are wanting a divorce we are separated and I've told him that seems as I'm the only person looking after the kids 24/7 that he needs to get the divorce papers sorted as I don't have the time to take the kids down to a lawyers and sit there for hours. And he still hasn't done it!!! I'm beyond frustrated he knows I have no one to watch the kids and unless I drag them down there I simply can't start the process then another issue is he doesn't know what he wants to do with custody. I've offered he have the kids on weekends and he has made no effort to see the kids so I just left it then I hear his going around telling people I am holding the children from him! I'm sorry if this makes no sense but I'm just beyond frustrated! When will this get easier!!! I guess I just needed to vent it out because I've been so stressed and hormonal