The melody of I Miss You by Clean Bandit ft. Julia Michaels runs 492 notes across 78 bars, 3:07 long in Ab at 104 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? I Miss You chords and lyrics.