Ive been with my oh for nearly 2 years now, I have 2 young children from a previous marriage.Got with him on the basis he told me he was single, but later found out he was still seeing his then gf at the start of our relationship, i found this out about 6 months in and hed ended it about a month in id say. Anyway, that obviously changed things a little. I asked him why he cheated and he saidnhe just didnt love her anymore, that hes never cheated before. He wernt expecting to meet me ( we met on a dating website) so he was looking whilst with her! Anyway, i was happy that hed finished it with her and he seemed happy with me and the kids, introduced me and kids to the parents, blah blahHes never shown any signs of cheating on me, he is funny with his fone and i admit i have checked it but found nothing untoward, i also know his pin, and heknows i know.Anyway, weve plodded along had a few ups and down regarding my insecurities,..He tells me how much he wants me and my children in his life, that he lovesnus...Now to whats happened this past week. Hes kept his ipad here so me and the iids can play games on it and stuff and i came across emails exchanged between him and some girls, about a year before we got together. The first one was a nice one to the girl he was seeing at the start telling her how much he loved her and how lucky he is. This was a message from 2010...in 2011 he signed up to the dating website we met on and the emails to the other girls started with pictures and everything, id say about 4 girls all together. He was on tour in afghan at the time so it mostly was sexting , there was one girl he was wooing and a few of the things he said to her he said to me. I dont think they ever met up, even though they talked about it. It was just an ego thingmi think. Anyway, the emails stopped and i found an email for a holiday that his gf had paid for and they went in may 2013. We met october 2013. And so here we are...Ive asked him (over text as hes away) about them, i called him a sleeze and how could he treat these girls like this...he said it was way before we met. Im not like that anymore..im happy and your the one. I said yes, but you said this to your ex, promised all the things you promised me, so what happened? He said we just drifted apart, i found you.I said well how do i know your not gonna do the same to me. He said i love you, your all i want in my life and i want a future with you. He promised me he would never do that to me.But how do i know this for sure?? I really dont know what to do, i have 2 young children whos already had the heartbreak of their daddy leaving, i really dont want them to go through it again as the love him so much.