Passion includes physical attractiveness and sexuality. Human emotions like love is when immersed in music, melodious as the voice of angels. You absolutely can not resist before he faced in the first minutes, the charismatic man overwhelmed you.
Intimacy between two people generates pleased attachment, intimacy and fellowship. This process is called debt married to a person of the opposite sex.
The first intimate formed when two people spend a lot of time together. Then they will become close through share issues in all aspects of daily life.
Intimacy requires lots of patience can form. In fact there are many people who love but can not have a feeling of closeness, it is because they are not prepared to build an intimate relationship.
Or someone who has experienced pain in the previous situation, it will be very difficult for them to be able to overcome skepticism walls erected earlier. They will tend to be closed to protect the current relationship from past injuries.