My heart really goes out to you Brokenwife! Such a difficult place to be for you right now. I do feel while you both have every right to your individual feelings on this matter, he is asking you to make a sacrifice that goes against your nature and your instincts and one which, if you wait very much longer, will be an irreversible one for you. On the other hand, he says he has felt this way for a long time but needed to be sure. Then really he should not have been stringing you along , looking for baby names etc. What I would have a problem with is this dishonesty really, even if it was because he didn't want to hurt you at the time. Dropping this on you now, is a far bigger hurt than it would have been if he had just been honest about his doubts all along. I really wish I could give you a hug, because I think he has put you in the most dreadful position. I can understand where each of you is coming from, but not his handling of the situation. Perhaps your love is strong enough and you can live with making this very substantial sacrifice, without regrets. But living with the knowledge that his decision stopped you from having the baby you always wanted, will always be a major issue in your relationship and may well kill the love you feel for him now. Seeing all your nieces and nephews is never going to let this matter rest in your head.
No easy solution here. But perhaps if you make sure he knows what a huge sacrifice he is demanding, he may rethink? It is wonderful that he is happier than he has ever been. But where is your happiness? Do you not deserve to be able to say the same thing??? I think you do!!!