I disagree. It doesn't need a border to look good, and adding anything to the girl will just ruin her details. Right now she looks very clear against the gritty background, which makes her stand out better.
What I would personally suggest is to rearrange everything there so that the girl is off to the side, and the text comfortably occupies the other side without looking squashed. If you move her to the left, make sure you flip her over so she's looking to the right.
The text is awesome btw, I wouldn't suggest changing it.
Same for the background. Those two elements work perfectly together, and the colourisation of the girl fits it too.
