The melody of This I Promise You by Ronan Keating runs 249 notes across 41 bars, 3:33 long in Eb at 88 beats per minute. The tab sits low on the neck, mostly under the fourth fret, 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? This I Promise You chords and lyrics.