There is nothing you need to do to talk to him just keep quiet and see if he will keep his promise and it should go without saying, if he has the mind and considers you as his friend he will give what has been promised before.
From the way OP narrated his friends action I don't think his friend would even regard him even if he gives him sometime because if he was a man of integrity he would have done what he promised, perhaps in other way round I think the OP should even be grateful that it happen that way because from that event he has been able to no the true nature of the person he called a friend, however in most cases how all this things normally end is when his friend will lavish all the money he has won that's when he would remember he had a friend, so I actually like the OP response to him because on this case silence is the best.