Divorce Support Forums: Confused, Angry and Scared

I have been married for 15 years. We met in the military when he was married to his first wife. He ended up divorcing her to marry me. We had a child 1 year after marriage(he did not have children with the other woman). We have been through violence on my part, 2 affairs on his part,1 on mine, and years of counselling. In the last 5 years we tried to get it together, but he started staying up for days, losing weight and unable to keep jobs. In the last 2 years he has been fired from at least 7 jobs all 6 figures. I think he may be addicted to [censored] cocaine. Friends and family have suspected this and brought it to me. Aside from unexplained spending, and the hours in the bathroom which he attributes to hemmorroids, I have never caught him. I have confronted him, but he has never admitted to it. In July after being unemployed for 6 months, he announced that he was moving to NJ to work a 6 month contract with an ex-coworker. I was heartbroken. We tried to make things work long distance, but the phone calls were short and we usually argued. I got very insecure and started to monitor the cell phone bill that is in my name. I saw a telephone number that had been called at midnight for 2 hours. The same number came up again 5 more times for at least 30 minutes a day. I called the number and asked the woman to call me back to explain the nature of her relationship. She told me he told her he was getting a divorce. I was heartbroken. I confronted him with by texting him a picture of her from her myspace page asking him who she was. That was last Tuesday. That is the last time we talked. He emailed me on Friday that he has never even met the girl and that he wants to end our marriage because he feels there is no room for him when distrust occupies so much. He told me he was sorry for misleading me about having female friends, but does not want to talk to me and that we would just be able to communicate via email. What did I do wrong?

Then I find out that he lost his job on Wednesday. I thought to myself, he has got to be on drugs. He just lost another 6 figure job after only being there for less than 2 months.

I cut off his phone on Sunday because I am paying for it. He called me from a Sprint store yesterday asking me to give the clerk my passcode so that services could be restored. I told him that if he needs to contact me to not call me anymore and do it via email. It felt good to stand up to him. Which I have never done before. And I filed for child support and separation yesterday. I really don't want to do this, I still love him. But I cannot take suspecting he is on drugs or his lies anymore. I emailed him and told him I still love him but that the only way he could come back here was if he admitted himself into inpatient treatment. I got no response. Could this separation help him see the light?