Oh I'm so sorry, lovely one.
You'll manage perfectly well without him; believe that because what he said is instantly dismissable bullshit. He said it to hurt you, to unbalance you and to disconsert you.
You are now meant to run after him, begging forgiveness for your folly and pleading with him not to abandon you.
Don't.
Find a solicitor.
Contact the CMS.
Contact Tax Credit people.
Talk to CAB.
Get copies of all the financial documents you can find, bank statments, payslips, investments, yada yada.
Hide the passports and birth and marriage certificates, you never know you might need them.
Being practical and focussing on keeping things as normal as possible for you and the children will help you get through the first bit of this when you are probably shell shocked and bewildered.
Do something nice for yourself every day - have a favourite coffee in a favourite place, eat a square (or two
) of chocolate (I'd make it three, but I'm fat and self-indulgent!), take a half hour to read a magazine yo like -just a small thing that you can look forward to every day.
Some people have found that getting new bedding helps a lot, especially if it's somethng they like but he wouldn't have.
Some people move furniture around a bit, or paint a wall a different colour. Smallish things which make the place feel a bit different and brings some 'new beginning-fresh hope' symbolism into the every day.
Allow yourself to be human. It will be hard at first and there'll be a merry-go-round of emotion hittting you. You will find a way through it, and you will create a new normal for yourself and your children.
Be strong. He has rejected family life, but this is NOT your fault, nor your responsibility, it is his failing.
Do not allow people to lay this on you.
You have nothing to be ashamed about.
You have nothing to be embarrassed about.
That all falls on him. That's his burden and make no bones about telling people so, if they seem to think it is your failing. IT IS NOT.
You will be all right.
Your children will be all right.