A question from the movie "Captain America: Civil war"
After the speech of Sharon Carter at the funeral for Margaret Carter

Steve Rogers: When I came out of the ice, I thought everyone I had known was gone. Then I found out that she was alive. I was just lucky to have her.
Natasha Romanoff: She had you back, too.

What does she mean by "she had you back, too"?

Question

A question from the movie "Captain America: Civil war"
After the speech of Sharon Carter at the funeral for Margaret Carter

Steve Rogers: When I came out of the ice, I thought everyone I had known was gone. Then I found out that she was alive. I was just lucky to have her.
Natasha Romanoff: She had you back, too.

What does she mean by "she had you back, too"?

Answer

It was implying that Steve Rogers was only looking at the situation from his perspective.  Natasha was trying to tell Steve that Carter missed him as well.