I am sorry that you are here and I know that you are feeling really low and alone. Most of us here have had the same feelings. All of us have cried out for help on this site. I know you are looking for answers. We all are! There are some good people here that will give an ear and advise.
First you should know that you are not alone. Secondly, if you have read DB and have read other sitch here you should realize that many of us have been going through this H*LL for some time, some longer than others. I have found that every sitch sounds the same, but yours, mine, and everyone else's are deferent.
My W walked out on me 5 months ago. Saying very much the same things that your H told you. I have read DB and DR and seeing a C. I have learned that time is your friend. Patience is an ally. The quicker to can start GAL (get a life) and develop a PMA (positive metal attitude) the better you will be. I am not saying it will be easy, for from it. If you are like me, the only time I am not thinking about my sitch is when I am asleep, if I can sleep. Take care of yourself FIRST! Read other sitchs, ask questions, and post how you are doing, what went on with your day.
If you are like me, I thought I could not live another day, but I have and I will, not matter how my sitch turns out. YOU WILL TOO! Things will turn out the way they are suppose too.