Cheating is cheating, whether it actually means something or not. There are no excuses. Hopefully it is a lesson well learnt. Sorry, I don't mean to sound preachy but I am just big on faithfulness.
You are just going to have to respect his wishes and his decision. Not everybody has the capability to forgive and forget. It does suck but it probably sucks way more for him. Take some responsibility for your actions.
[SIGPIC][/SIGPIC]
Love is like a merry-go-round: you get all dizzy, and then you feel sick!