You cannot force or make someone do something they don't want to or especially choose not to see or deal with. In most cases someone is aware of what they want/need however, when they don't verbalize them to someone that wishes they would that would indicate they choose not to tell you at this time - maybe they are too shy still, don't trust you enough to share feelings or just in general feel that you are not the one he wishes to share this part of him with. Just because you want him to be a certain way and feel that its possible does not necessarily mean he feels your the one that is worthy to let down his guard with. Let this go, don't pressure him and allow him to be comfortable enough to talk about his feelings when and if he wants or chooses too. Be pestery with this will only push him away.