Some last words of advice bro. FOrgiveness is a powerfull thing, not only for the reciever but the one doing the forgiving. It sucks to get shit on by a friend, but at the same time, if he is a friend he may actually realize his mistake allready and feel like shit about. We are all human and let things slip and regret it later. If you confront him in a harsh way you are likely to force him to go on the defensive and things will escalate and degrade from there. If it were me, I would simply approach him, calmy and let him know that he betrayed your trust and how you feel about. If he is a true friend letting him know how dissapointed you are in him without jumping down his throat, threatening him etc, you can rest assured his feelings will get the better of him and it will bring about much more thought than yelling at him.