One Direction - Diana Lyrics Meaning

I think Diana is for the fans dealing with depression and bullying etc.
The first verse, "The front pages are your pictures, they make you look so small, how could someone not miss you all?" I think might be a reference to the fan pictures that the This Is Us poster was made up of and that you couldn't miss them no matter how small they made them.

Harry's part is about how he means her/the fans no harm and no matter what language she/you speak, he can still hear your call for help.

The chorus is about how he wants to be the one to make her feel better and save her life. He can 'feel' the girl/fans crying and he wants her/them to let him help her.

Niall's solo is about how it hasn't been very long but she's feeling worse and he's amazed at how someone could mislead and lie to her by making her think she isn't wanted and that she's stupid and ugly etc.

Louis' is about how he wants to help her get better and feel better and that no matter what language you speak, they're both the same and he can still feel that she needs help.

Harry's second solo says that he wants her to trust him and he'd believe in her and be there for her no matter what happeneds.

And I think that the name 'Diana' is a reference to Princess Diana who had depression. I also don't think it's a coincidence that it is a princess they were talking about. I reckon these means they think that 1)No matter who you are, you can still get depression, even famous & royal people can get it and 2) that we are all princesses as well.

Anyway, I think this is what it all means, from what I've put together. :)