My wife and I asked a friend to be a known donor, after he offhandedly offered several times when we discussed hoping to start a family. We met face to face and the three of us had a conversation, expressed hopes and concerns, and while it was awkward as all hell, it was good. Since then, he seems to be avoiding us, often busy when we initiate hanging out, and the energy just seems a bit tense. Despite this, he reassures us that he is still totally on board.  Does...