Quoting S U Z I E:" You know what's worse than wasting 2 years of your life with a cheater? Wasting 2 years and 1 day of your life with a cheater....."
It will feel like the end of the world, but give it some time and you will be sooo glad. I was in that situation and I was just miserable not trusting and trying to find something on him. I got all his passwords, from the forgot password link on his email. From there, I got all his social networking passwords and found out smurf I didnt want to know or see. It broke me, it really did.
Don't find things. If you can't trust him, let him go. Seriously. You will find someone better that you DONT have to constantly worry about being unfaithful.
2 years is nothing compared to the 70 plus years of life left.