One girl is appearing in all my dreams. is it normal?

I loved one girl from elementary school. She wasn't my first love. I was sure that she liked me too. Then my family move to another country for work. After a few years we came back. I even met her back in school, but our relationship changed. We were in different classes too now. After some time school ends and I start to ignore my memories with her from the past. For a long time (I met her only about twice a year) it worked, but after 5 years she starts to appear in all my dreams that I can remember. She is not definitely main person in those dreams. She is appearing randomly. Even in weird dreams.

For example: I was a passenger on the plane, which needs to crash-land shortly after takeoff. I was sitting in left row closest to the aisle and I know that we are going to crash. I looked on the right side and she was sitting next to me across the aisle. After that plane crashed and dream ends and I wake up.

Sometimes she appears in dreams that looked more like a memory from my past when I was abroad. Correct place,
correct people, sometimes even whole situation from my past, but she was there too.

She is like a ghost in my dreams or character "Mal Cobb" from movie Inception.
I can't tell if she is good or bad. We are never talking in those dreams and almost every dream ends shortly after I notice her.

I actually thought that I will go talk with her about this to solve it. But never did it.
It's now almost 5 years of this dreaming. Maybe I the end I will talk to her after all.