OP is probably making peace with this situation by posting this stuff online, it's probably a relief when you share your burden with others. People of action wouldn't waste time on that... that's for sure!
Based from the story the OP provided, it looks like he is Kelvin and just wanted to vent out here on the forum for what he did to his friend. He mentioned "me" referring that he is Kelvin on the story. I think is having a hard time fighting his conscience to what he did.
Kelvin secretly withdrew the money and ran away to another state where he feels Charles wouldn't find me,
A friend should never be treated that way, no matter how much money is at stake. You lose a little bit of your faith on humanity when friends turn their backs on you. Money shouldnt be the most important thing in your life; it should be secondary to love and friendship. But really, after something like this, you can only move on and try to avoid making the same mistakes. You can't let people get under your skin and hurt you.
I don't really think that they are really that kind of friend as they only share a common interest on gambling, based from my understanding. Also, you don't know how people really react with huge amount of money not only to their friends, but rather to their loves one.
Anyways, Charles can try to find justice by putting this on court as long as he can provide proof about the shared funds they use to gamble.