Men fear rejection. Most men feel that women are very critical of them, and they worry that if they do open up, someone’s going to laugh at them, leaving them rejected and humiliated.
Not judging your partner means allowing him to say what is on his mind, and simply being willing to hear it. This does not mean that you don’t have an opinion or that you can’t offer it at some point. In order for him open up to you, he has to feel truly accepted for who he is. Be patient with him.
A man has different reactions at different points in his life. Don’t be afraid to allow him to show you all different parts of himself. If you can let go of your expectations and really just try to find out who he is, he will immediately sense it, feel greatly at ease and enjoy talking to you.