Maybe you should give him another chance. I did the same thing to my husband 4 years ago and really regretted it after I left. I begged him to take me back and made such an effort to be a better wife and he became a better husband.
Weirdly if that hadn't of happened I don't think we'd still be together now, it made us appreciate each other much more, we also realised that we weren't perfect but our kids and family were more important than my infidelity.
Don't get me wrong it took a while for my husband to forgive me but when he did it was the happiest day of my life, I felt such a relief, so I kind of know what your husband is feeling.
Make the right choice xx