Here's my perspective, as an adoptee who has searched for her birth parents as well.
Was he searching for you when you found him? It is my belief that the one searching has to recognize that the one being found may not have been prepared or had time to process the reunion if they were not actively searching themselves. Each of us deals with such a life changing event in our own way and processes it differently. Maybe he needs more time to wrap his brain around the fact that you've found him and what that means going forward.
What are YOUR expectations for a future relationship with him?
Here's my story. I searched for my birth mother. Here in GA, the state actually has a Reunion Registry, run by the Department of Natural Resources. For a fee, they will search for and contact the birth parent that you are looking for. For a smaller fee, you can receive what is called "non-id" which is non-identifying information about the circumstances of your birth - information that doesn't identify who your birth parents are by name or other identifying information, but gives you some background on the situation regarding them giving you up for adoption.
I received my non-id before I asked the state to seach for my birth mother. In my non-id, it stated that in order to deal with the pain of placing me for adoption, she did not wish to know my sex, and planned to pretend that I had died at birth. In the 60's, birth mothers were knocked out during delivery, so that they would not hear their baby's cries.
When I read that - I prepared myself that my "fantasy" of a joyful reunion was not likely to happen. It also stated that my birth father rejected her after she told him that she was pregnant. Back then, she didn't have to name him, so his name is not on any of my paperwork that the state has. She is the only one that knows his name.
The state did conduct a search, they contacted her brother's wife who was aware of my adoption and also knew that she likely would not want contact with me. I did prepare a letter and asked them to read it to her when they made direct contact with her. She did say that she did not want any contact with me, but did allow them to read my letter, which told her that I was adopted into a loving family, that I thanked her for making a selfless decision, and that the door was always open to her.
Consequently, since she said she didn't want contact with me, the state could NOT give me the information on my birth uncle and his family - who DID express a desire to know me.
Fast forward nine months (ironic, eh?), Memorial Day 2000. A private investigator contacted me, because friends in the adoption community made a plea to him to help me with my search outside of the State run confidential intermediary. He was NOT bound to keep any information private. He waived his $1000 fee and in 48 hours I had my birth mother's name, address and phone number, as well as that of my two 1/2 sisters and all my aunts and uncles.
Because it was not my intent to disrupt my birth mother's life when I searched for her or to upset her, I did not contact her or my sisters, but was able to determine which brother the state had contacted, and I've been in reunion with them for the past 8 years. I fly out to see them once a year and spend a week with them. I adore my cousins and their children.
I am very sad that my uncle has decided NOT to tell his sister that he is in reunion with me, and while on one level I can understand his decision, I have a hard time emotionally with it. (She lives in a different state). I also have not contacted my sisters, because I've been told that my birth mother believes that if her husband were to find out, he would leave her, and turn her daughters against her. Her fear is real, and I respect that. I just want her to know that I love her for giving me life, but I have no way to do so without him knowing about it (he apparently reads her mail and listens into her phone calls).
I also would like to just like one conversation to find out my birth father's name. I know that he was married at the time and his wife was also pregnant. He may not even be alive, as he was a leutenant (sp?) in the Air Force at the time, and very well could have been deployed to Vietnam. I would like the opportunity to know any siblings on his side.
Sorry for the long winded response, but I did want you to know that our reunions aren't always what we imagined when we are searching. Sometimes the search itself is so exciting that the end result can be a let down. If you can, try to give him some time to process this and let him reach out to you when he's ready. Try to have patience, I KNOW how hard it is!