Feeling really upset again. I feel so lonely. I cannot do this
Husha, I know its hard not to look at the years in front of you and wonder how you'll manage but the reality is that the years ahead of you aren't important for the time being. Whats important now is breaking the day down into small bits and getting to the next part of it the best way you can. I used to go to bed and think 'ok, tomorrow morning when I get up Im going to get through the first two hours by doing x, y, or z, and if I can do that Im then going to try the next hour doing such and such. And its funny because Ive always been a very early riser who jumped out of bed as soon as her eyes were open but Ive now found that I prefer a much slower and gentler start to the day. I get up, have a wee freshen up, get my breakfast sorted then go back to bed with it all and read the paper, my emails, and watch something on catch up. I love it and once I get up properly, about two hours after I first got up, so about 8am, I then get showered etc and start my day. Where I live people are at work from about 7am so me getting up properly at 8 is a bit of a late start 
And thats the point Im trying to make here - dont worry about years in front of you because the way you live the little bits of your day in the here and now will be the making of your life in the future. You're going to discover so much about yourself even though you might not even be aware of it right now.
I know that right now you wont be able to comprehend this or much of anything we say to you because your pain and upset is so overwhelming but if you could try and persuade yourself to concentrate on the here and now emotionally I think you would find it helps.
Reading back through your posts its apparent that this is the second time you've found yourself in this situation with your husband. It happened to me also and I realised that I lived with quite a high level of 'invisible' fear after his first set of antics. A few years later I then discovered his second lot of antics and it was enough for me so I instigated our separation and part of it was because I was determined I'd never live in fear again. You see, thats what these men want. They want us to be 'cowed' and to live in fear, to be their victim always, even when its all done and dusted. They want to move on with knowing they had overwhelmed us, that even to the end they had us where they wanted us. So it really is important that you try to stop being afraid (probably even of your own shadow right now) and break down your day into bite sized pieces that you can do, and don't scare you, because one day they'll all add up into a life that you meet head on and enjoy as a confident woman who doesn't scare easily.
There really is so much more for you out there than life as a woman in a one-sided relationship with a man who made cheating and having you in a corner a lifestyle choice.
I will get back to that Im reply later today. Its been a bit hectic here with my son. xxxxx