husband having oral sex with other men

I have been married for 5 yrs to a really wonderful husband. We each have children from previous relationships/marriages. Less then a year after we were married, he confided that he had a desire to have oral sex with a man. I foolishly thought that if I allowed it to happen, that it would be a one shot deal (no pun inteded). I gave him permission to act on it. He did, and I thought that, that would be the end to it. Several months later, I found an email on his BB. He was to meet up with another man but couldn't because of work. I confronted him, and he was embarassed and said nothing had happened, and it wouldn't happen again. A year later I was pregnant with out daughter, while I was pregnant I was playing around on his phone and found another email response, only this time it was to a woman... talking about different sexual acts with her and have her husband watch. Once again, hurt and saddend by his betrayal, I believed that nothing happend.... Then earlier this week, I used his BB to go online to look at some banking stuff, I saw in the brower that he had been visiting Craigslist again. This happened on the first night of our 3 day family camping trip with our little gir and my 10 yr old son. I said nothing for the 3 days, but when we came back home, I looked more closely into the browser history and found he had replied to several ads.. some seeking other men, some seeking other women and a private yahoo email account that I didn't know about. I confronted him that evening, and he confessed to engaging in oral sex with 2 men in the last year. My heart feels as though it has been ripped out of my chest again. As I am writing this, I realize how foolish it sounds to have trusted him so much. While I have contacted a marriage counselor, my husband is at this moment attending a Sexoholic Anonymous meeting. I would love for my marriage to survive this but I just cannot see how it can. I am a broken woman.