I am looking for the song ,,lonely,,

Hi
I'm looking for a song probably in the title there was the word ,,lonely," or "alone," I can't remember, can't find it.... :(
The music video was in the form of anime, two characters boy, girl, different shots, they were sitting on a bench, they had smartphones in their hands, in the music video there were also written words of the song, lyrics.
I am very much asking for help if anyone associates, it troubles me terribly :o
The song be maybe 4-5 years ago.