Summer Fling turned into nightmare

[bluthre]

My husband and I have been married for 5 years and together 10. Everything has been near perfect up until I made the biggest mistake of my life, this summer I went on vacation with a group of my girlfriends and met someone interesting. Sure enough I slept with the guy more than once while away.
And kept in touch even after coming home.
My Husband discovered some very intimate emails between me and the other guy very detailed.
My affair lasted for about 2 months emotional affair lasted for about two months before my husband found out and he is now dead set on divorce.
He has told multiple people in his family about what I’ve done, and announced via social media that he is indeed single.
At the time he is currently still living at home but has moved to the basement.
I have been miserable since everything has happened because other than a little excitement this other guy served no purpose in my life.
I’ve tried to express this to my spouse but because of the things he’s seen in the emails/ texts he doubts everything I tell him when I say it was nothing more than a fling and questions rather or not I was preparing to leave him for the OM.
He is now flirting with multiple women and is telling them he will be divorced soon and I know for a fact he has slept with another woman due to my own snooping.
Once I presented him with this he calmly stated none of this would be happening if I didn’t do what I did and he doesn’t feel bad because there is nothing between us and he is technically free so he can see and date whoever he pleases.

For the past 6 weeks all we have done was argue day in and day out me beg and plead daily etc. after discovering this site and rules a few days ago we had our first rational day in this house no arguing and he says I must have finally come to terms that its over, but I haven’t I so desperately want him back.
We have had sex twice this week since the arguing stopped the first night he left our/my bedroom and went back to the basement the second time he slept with me the whole night but told me to not confuse this with anything other than sex.
I can really use some advice, support anything.