What does it mean when you dream of a person that changed your life?

I had a dream of this girl I knew and she never really talked to me when i knew her but without knowing it she changed the way I feel and react to everything beyond that point in my life. i had a dream today about her where we talked and traded mutual feelings and I felt peace with the world as if my brain were trying to make amends with the nostalgic overcoming of my built up feelings for this girl. can anyone tell me what this means?