Boyfriend did come out and tell me he had a past of having sex with men. It was something I discovered while cleaning out his email inbox. And yes this was before me. I understand but only two days prior we made the decision to be exclusive and just be with each other. He actively sought out sex with a man he had sex with off and on for 2 years and when the other man declined and actively asked for 2 weeks and still got the same answer. But now he claims that part of his life is over and done with and he no longer thinks about it or wants it. Can this be true or just another lie?

would it be different if it was women. If a man, has open sex with several women, up till the day, they want to be committed to you... would you trust them?

Being bi-sexual ( or even gay) does not mean, they do not have values and desire to be in a committed relationship. Before, there was promises to be true, there was no promise and either was free to do what they wanted.

Will he think about it some times, may he want it sometimes, sure, why not.. he may also think about a women in walmart, or think about a half naked women, walking down the street also.

the issue, is, if he is going to stay true and not do anything.

Are you questioning his loyalty, or sexuality? Unclear if his pursuit of another was while he was dealing with you. Would you be as concerned if this was a female? What do you mean by "Can this be true, or just ANOTHER lie"? What OTHER lies are you referring too?

Yes, it could be true. We aren't trapped in categories, you know. There is nothing unusual about a man having sexual experiences with other men before forming a long-term relationship. These days, it is becoming more common for young men, especially, to experiment with other guys before they reach their mid-20s. College guys, for example, who are roommates or frat brothers might help each other out because they are both willing and available, but it doesn't mean they are secretly gay. He trusted you with his emails, didn't he? He told you about his experiences, didn't he?