Does not love me, living seperated but under same roof?

When I said my vow for good or bad, I'm here. Out of the blue he is not and never was in love with me after 8 years of marriage. We have two children together and my oldest from a previous relationship that he help raise as his own. The seperation came after I discover his has been talking to someone secretly. He said she is just a friend and only saw her couple of times. That's when he told me there's no point in staying married, I said " I want to win you back" He said nope, but supposely there's no one in the middle to affect his answer. It has been a very long weekend, situation is very fresh but painful to me and my children. So he can see a strong woman, I don't show him that I'm depressed for him, cause i did when I was crying and begging him not to leave. Which he did, left to a hotel, but I guess it not the same life style he had at home. At the end of my desperation with the help with my friends, we made an agreement for him to stay home so he can help supposely with the children 4 and 2 oldest 13. I think he is just buying time to save money. Anywyas, I told him with the condition he does not disrespect my home or do his worldy things around my children. We are a cristian family only he is turning his back on God and his family. His relationship with the supposely friend, their communication has incresed, txt msg morning to night. However he says she's only a friend. I just feel like kicking him out to the curve. He said he will give me the same lifestyle for my children, so why make it easy on him, but down in my heart I'm in a big whole trying to climb up but can't because I love him dearly, ready to work on stuff to save my marriage. He says he doesn't because ofcourse his in lala land with this girl, so why doesn't he just leave the house, give me the divorce papers... Sometimes I wish, because of his EGO he won't say sorry.. I always kept up with my self and meet all his needs then his selfish needs tlaking to other woman. If I did anything wrong, I fixed it. I always dress nice, but been dressing much nicer since I lost more weight not that I was over weight. He sometimes glimpse at me, or talks to me nicely as a friend. I bite my tounge so i won't cry... Do you think I even have the slightest chance to win him back, even though he says he doesn't love me???? He is very harsh temper guy, and he want s things done a certain way,and I know these young girls now and days don't meet those needs..HELP