Even after walking out on my ex (after a cracked rib-while pregnant, his affairs and all the other crap) there are still nights nearly 5 years on when I think that perhaps, if I had stayed, that everything would be ok!
And for who knows how long had I been thinking I should leave this relationship - but couldn't actually do it! However, over one weekend, and to this day I don't know what triggered it, I decided that I just had to go! Once my mind was made up - my 6month old daughter and I were off like a shot.
I only took mine and little ones clothes and a few personal & baby bits - I left everything behind! I went back to my mum & dads, before sitting to work out how the hell I was going to support myself and my daughter. Because my name was still on the mortgage, and i was still paying my share and well as some of the bills, I wasn't entitled to anything. When we sold the house, we lost a large amount of money due to a number of reasons - and I had to take out a considerable personnal loan to cover my share of the debt we were left with. Even now, althought I get my tax credits most of my monthly salary has to go on paying old bills! I may not lead the high life, have a flash new car, take 2 holidays abroard a year, etc, etc that I know my ex has - but I am happy and so is my daughter!
Be strong - a wait for the right time - it will come!
Good Luck!