The melody of I Want You, I Need You, I Love You by Elvis Presley runs 264 notes across 34 bars, 3:57 long in C at 70 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 Want You, I Need You, I Love You chords and lyrics.