I realised the other day that on the 13th November 2009 I left my partner while he was at work. It's been 10 years. It took me a long time to get to that point. Many a MN thread. Help from WA. A lot of online support.
I moved out with clothes and toys and a double airbed, onto a new rented house on a seedy street with my son.
I sat in that empty house and smiled. 
I made that little house my own. I painted it happy colours. I bought furnishings over time that made us smile. I got my finances slowly in order and me and my son went on adventures. I learnt to drive and succeeded.
I dated a few guys and binned them off if they weren't amazing.
10 years on. I've moved twice since then both for positive reasons. I've been with a lovely guy for 5 years and we have a baby. 
He isn't perfect and neither am I but we both go out of our way to make each other happy and support each other. I have high standards for my relationships these days.
I wanted to say thank you.
I couldn't have done it without Mumsnet.
Anyone in a bad place relationship wise please know its not you. Life can be better. You can be happy! Your kids will be fine because you will be fine. Its not your fault. Be brave and strong. You might be told your not but you are. You can do it.
(Ive come back to my original username from back then so if anyone wants to they can find my old threads. But be warned they're quite a lengthy read!)