cheating husband

We'd been married for 8 years now with three kids, I am aware everytime he goes to the night club, having a one night stand with some other girls & I also know that he had a ******* buddy the time he's been working as a customer service rep. I already accept the fact that I cant change him, it hurt me so much, but it doesnt make me give up all weve been through, because I dont want to give my kids a broken family and of course because i love my husband so much and i think i cant live and start my life again without him. Then before our 8th anniversary comes, we gotten into the worst fight, that made him go to the night club again, and then he met this other woman, whom she became his gf, and this girl is so attached to my husband that she is willing to be his other woman, i dont know what was her intention but my husband is also so attached with her, he also made another facebook account so they can communicate there, he also had this secret inbox on his phone so i cant caught him cheating. Then our anniversary comes, he confess everything to me, he told me that he has another woman that he think he already love, and the days had passed, he changed his number and promise me to not communicate with her again, but of course its just a promise. They still communicate and their relationship continued. It also affect his work on our family business, and now one month had passed since they dated because im always with him everytime hes going to checked our family business, im always with him everywhere he go, but this girl is so bitch that he still tecting my husband sweet messages, and now that were fixing our relationship, my husbsnd tell her that he want to end things between her, but the girl asked my husband to meet her for the last time. And now my husband asking my permission about it. What am i gonna do? Do i let them see wach other again? Please helpppp