Haven't read original post so apologies if I recap or misunderstand something in your situation....
I am recently seperated too, my husband and father of our 2 children, in the middle of a break up, I say middle as it was I who finally said I was not putting up with his rubbish anymore, went home, he who said that he still loved me, that it was all coming from me, and then found texts on his phone to find that inbetween his visits and us getting on again, finding middle ground and he being in my bed he'd been dating someone else! I felt an ice knife rip through me..... how could the father of my children, my husband of 7 years be so disrespectful to me, so hurtful, so damn selfish and dishonest.
We are struggling to sort maintenance at the mo.
Like you each day is a step forward and just when you think you (I am) are making progress he contacts. And its like 2 steps back. Your heart is ripped back open. It's shit on the grandest scale.
People keep telling me it will get better, and much like grief I knwo they mean well, but it doesn't cease the pain. The hurt, the embarrassment, the humiliation, the sense of worthlessness.
But above all.... its his loss. We WILL be stronger for it and given time we will see light at the end of the tunnel (and so I keep telling myself), and when we do, they will be a mear spec on the underneath of a dirty shoe of nothingness.
Keep the strength - know that your not alone, and together we will get there. x x x much love.