BtR,
I have disclosed to my two sisters (both younger than me) and they have been 100% supportive. The older one in particular, who has been my best friend for decades anyway, has been just great.
I do find, however, that my personal issues still get in the way, no matter how understanding people are. I have found it very difficult to tell them some things that they needed to know in order to understand how this has affected me. Somehow I still wonder will they really believe me; can anyone who has not been abused really accept that such awful things have actually happened to young boys? Then when they DO believe me, I feel ashamed and guilty and wonder will they think this was my fault?
As Darkheart so rightly comments, you do have to understand that this will be a learning experience for both sides.
One thing that I have posted about before, but will repeat here because understanding this has helped me so much: Friends and family will in most cases NOT be expecting what you are about to spring on them. They will be shocked and embarrassed, and in many instances they will feel so awkward that they will have not the slightest clue what sort of response is needed or what is appropriate. They are likely to blurt out anything. Some examples I have heard about: "So are you gay now?" (friend), "Why didn't you say no?" (mother), "Did this happen in my house?" (father), etc., etc.
It is a huge emotional moment when you disclose, and if you get the "wrong" response the resulting sense of disappointment and disempowerment may tempt you to get angry or just shut down. But try to bear in mind that the other person needs to come to terms with what you have just told them. They don't mean to hurt you or say something cruel; most of the time they will just be stunned.
That said, I have had all good experiences so far. I try to ease into what I want to say, so the other person gets the idea this is something very serious and difficult for me, and then maybe will even figure out where I am going before I get to exactly what I need to say.
With people who already know, how I feel with them later on depends on what our relationship is like. With family members it is a bit strange for me. I know they love me unconditionally, but I also know they want to know more in order to help me. And I know I will want to tell them, even if they ask something very painful for me. This feeling of insecure boundaries makes me feel like I have my "Raped" and "Guilty" signs up and flashing. I know I could just say please no questions, but that's not what I want. I WANT them to feel I need their help unconditionally just as they are willing to give it unconditionally. So it's a strange situation: I want boundaries but not barriers, and I don't know how to make family members see the difference. I don't think I know myself.
With friends it is easier, because I feel secure that they will not just pop something on me. If they have a question to ask I will see it coming and will have a few moments to think. One very close friend who cares about me a lot will ask me how I am doing. I know what she means, but if I just can't get into things that day I can easily avoid the topic and then bring it up later when I am more comfortable.
But in the end I couldn't agree more with, again, what Darkheart says:
It will take lots of time. Those closest to you will learn to read the signs, and will learn how to act in given situations. Give yourself and them the chance to learn together!
Take care,
Larry