sweet heart I know what your going through I went through the same thing for six years and I couldn't take it anymore though my ex did have cancer as soon as I left him I found out he had diabetes and almost died. If you feel you can hang in there but in my opinion you and your son will be much happier in the end away from that. Look at it this way ur not sleeping in the same bed any how. sleep in your own bed in your own home and have your own dignity I wish you so much Lucj your going to need it