My SO is a sex addict! Help!

I've only been married 6 months and I found out last month he cheated on me with prostetutes and this morning something told me to look at his phone. I looked thru his emails and he had so many sent emails to these strange women from Craigslist! I almost fell out from my heart breaking. We have started marriage counseling the other week but just looking at these emails just broke me! The latest one was from last Monday and they go way back to the beginning of the year! Wth I have no idea what to do. Not even sure if I wanna still try and save this marriage. I makes me think he doesn't want to be married at all!????help!