Mysterious

There she was. Everyday. Every concert. But no-one saw. Absolutely nobody. It was just me, they were all convinced I was just stressed out about the tour, and that I needed some sleep... But I'm not going crazy she... This girl... She's so beautiful it's like the world stops so that I only see her when spot her at our concerts, always front row and always the middle seat. I don't care what I do I will find her and I will tell her how I feel...

Do you think it's possible to fall in love with someone that only exists in your imagination.
Apparently Brad has done, but is she really just his imagination or is it all real...