My SW life is adversely affecting my health. How do you compartmentalize?

I read the replies here and your original story with much interest. I could have bet before reading the story that you were in a sexless marriage. First of all, let me say I was in one too and I left it 4 years and a bit ago. I think I first joined EP long before its glory days while still in the marriage. The ex knew about my being on EP and had no interest in it. I think it is easy to lose yourself in the fantasy of people on-line. Don't get me wrong-there are many good people here as were on EP. You can get some really good advice here (mind you, EP had a much better forum on Sexless Marriages-it was the largest forum with the most unhappy participants). And it is easy to fall in love with someone who listens to you and may even be in the same situation as you.
You mention the stress you are having. It is natural to feel this way when you are so stressed in a sexless marriage. So you feel guilty about coming to SW and finding some happiness. You have a few options. One is leave here. Cold turkey. So again you are alone and unhappy and unheard. Nothing solved. You could limit your time here like AZ has suggested. Set a timer. Follow a strict schedule. This helps you a bit. Another choice? Get some help in your life. I skimmed your initial story so I don't know the time you have invested in a cold marriage. I want to tell you I spent 3 decades in one. Granted it wasn't always sexless, but mostly. I had one son. It is a long story and if you wish to discuss this with me just pm me. You have to make sure that you have tried to "fix" it. Tried everything. Then you have to decide if you want to exist like this til the day one of you dies. Can you do that? If you have a career, you have the means to support yourself. That is great. If you don't, it means more work. I am not going to say it will be easy, because it won't always be. But you can be happy and love life and be free and eventually, if and when you want, you can find someone who will love you like you deserve to be loved. No hiding anything. No feeling rejected, worthless, depressed, angry, alone, etc. All the myriad of emotions that one experiences in a sexless marriage. There are many excuses for staying. The most significant one is fear. Fear of being alone truly. Fear of financial problems. Fear of this and fear of that. I want you to know that no one I have ever talked to or helped leave a sexless marriage has ever said they wanted to return to it or regretted their choice. It is up to you how you live your life. So hear my words. I hope they help. My offer to listen and to advise is open to you, girl. You are never too old or too anything to have to settle. These are my words to you. I wish you a better life. It all starts with the thought that freedom exists. You decide how far to take it. I hope you RUN with it to a future, a happier one.