This term "so close yet so far" seems very abstract until you really have experienced it! I have profoundly feel it recently. when you stand next to somebody, you just don't know what to talk about. The conversation between are all those trivial things. You can feel he built high walls around and his heart is blocked. You have no idea what he's thinking and how he feels! You only feel that he's so far away from you and that's a bloody bad feeling! It really makes you feel blue and depress but nothing can be done.