great song. the person who loves knows that the person who he loves is totally apathetic to the feelings being felt. when he says " I'm in the middle of your picture" he is expressing that even though he is the focus of the picture(middle) the loved one still ignores him and his feelings, but thats o.k. because that's " ... all I need". in the end he laments that this kind of love is painful and questions it's validity because it's wrong that his love is not being returned, but at the same time he loves this person so much that its a moot point to even question it- " it's all wrong/it's all right".
it's the things in life we need but just can't see even if it's presented right there in front of us... because most of the time we choose to ignore it or we keep on looking for the wrong things...
This song expresses the feeling of somebody who can't live freely his/her love. The person loved (who, maybe, doesn't love back the lover) has another life from which the lover is kept away. The lover is a weak person, who depends completely from the loved person. At the end, the repetition of bad/good moods shows the moments of happiness followed by the moments of deep sadness.