I always advise people that during the first three months of dating, both people are probably playing the field because there can’t really be a commitment until you get to know each other. So in my book, it should have been assumed that he was dating and even sleeping with someone else until you each decided on giving it a go, monogamously. Which is exactly what he did. So, unless he came out and blatantly lied to you, I don’t think that what he did was so wrong. You were expecting monogamy before there was a commitment. Oops. 😳
Since you say he’s now monogamous and committed to you, it’s your responsibility to drop this. I know you have past issues with trust, but it’s time to change your behavior and stop bringing this up. If you continue bringing it up, it’s going to cause him to leave because you’re giving him a problem he just can’t solve, and men don’t want to be seen as people who can’t solve their woman’s problems. They want to be able to make their women feel good. If he can’t, he’ll leave.
So let it go. And focus on what you do have! 😀
I hope that helps. Please follow me @AskAprilcom on Twitter and on Facebook at this link: [url][/url].