This song reminds me of a girl I knew in the Nineties. She was lovely, but I don't think she had the same feelings towards me which I had towards her, though I was too shy to ask her out. We spent quite a lot of time together and were friends. Then she went away travelling for a year. I saw her a couple of years later when she got back, just bumped into her in the street. I smiled at her and said hello, and she smiled back at me and walked on by. I had told her something about my mental health problems, and her previous boyfriend had had some serious mental health issues, so I think that probably put her off me. It makes me sad to listen to this song, but I accept that it wasn't to be. I still think of her every now and then though, and I hope she is doing well.
The only way to really ignore anyone, is to start by ignoring yourself. The lonely sea slug cruises the largely barren mid-ocean floor, tasting everything it comes across like a toddler, attempting to determine what to eat, run from, mate with, or ignore. Of these four choices, the only practical use for its pathetic excuse of a brain is figuring out what to studiously ignore. Half of life is just showing up, making the journey, while the other half is learning what to studiously ignore.