Often good hospitals have rape intervention programs, and while these were developed to help women who were raped as adults or who have a history of child abuse, the good ones know to treat men as well, and often that help is free. At least they should be able to refer you to an appropriate place. There are also centers that treat abuse and incest in some cities. That is the case as a child, but it doesn't have to be the case as an adult. I have known boys who made it their business as they got older to find people in whom they could confide.
Silence is one of the worst aspects of abuse.
If a boy or man feels too ashamed to talk to anyone about what happened, then it festers. I run groups for sexually abused men, and I am always amazed and gratified when they see that they are not alone and what a difference that makes to them. This is only a first step in healing, of course. There are also some web sites now that have chat rooms and bulletin boards where sexually abused men or their partners can talk to one another anonymously, as you are doing here. For example, through further psychotherapy or via a medical approach, in the context of chronic depression and extensive abuse histories.