Sounds like to me.. that you would be better off on your own and happier.

You are doing just that right now what difference will it make?

You are a fab mum and your children need you and need to see a loving caring parent/parents,

Him not helping etc... will impact on your kids.. not seeing dad help you or bath them or feed them

I wish you all the best, but i think you know what is best emotionally for you and your children.