[mojo]

I wouldn't tolerate it. 800 texts?? I would surely bet there is more to it, but even if it is just texts you say it's the third time? He doesn't care about your feelings, he has shown that. He may at this point care that he was caught and be ever so sorry and promise it will never happen again. I'm sorry, for me that would be too much. Of course that is easy to say and I am not in your position. But I surely think this will continue to happen irregardless of the promises.
Do you plan to have children with this man? If so, think 5, 10 years down the line and how it will feel to find out yet again he is cheating on you. Now you have children and are stuck as you want them to have daddy.
I do agree you should see a counselor BY YOURSELF prior to making any life changing decisions here.
I'm so sorry you are going through this, but please know you are worth more than that and don't have to share a husband with anyone.