Love is the maturation of friendship. You must be friends before you can be lovers. Infatuation lacks confidence. When he's away, you wonder if he's cheating. Sometimes you check.
Love means trust.
You are calm, secure and unthreatened. He feels that trust, and it makes him even more trustworthy. Infatuation might lead you to do things you could regret later, but love never will. If you have love in your life, it can make up for a great many things you don't have. If there is not love in your life, whatever else there is has a lot less meaning.