lulu41, you sound like you are really struggling and i am sure that you must have anticipated some harsh responses, as it is such an emotive and difficutl subject
there has been some supportive comments too
but you are never going to get 100 % support for an OP discussing leaving your children on mumsnet
i would see your GP re your issues, you are clearly depressed and not thinking straight
perhaps call teh samaritans
also seek legal advice re the ramifications of leaving
don't just walk
think about whether a break of a few weeks might be better, whether you need some rest and support, or if you are genuinely convicend you can live without your children for the rest of your life, as tehy may not want anything t do with you when they are older
this is a massive undertaking and you need more support than i thikn MN can give
discuss with someone in RL too
if you are so miserable and cannot envisage being happy with your children you need some help
then you can make a rational decision