I GO TO PIECES (Peter and Gordon)

From Wikipedia:
Peter and Gordon were a British Invasion-era duo and formed by Peter Asher and Gordon Waller, who achieved fame in 1964 with "A World Without Love", and had several subsequent hits in that era. Other hits for the group included "I Go to Pieces" (U.S. #7), which was written by Del Shannon and given to the duo after the two acts toured together, and remakes of "True Love Ways" by Buddy Holly and "To Know Him Is To Love Him", by the Teddy Bears, retitled "To Know You Is To Love You." Peter and Gordon had their last hits in 1967, with "Lady Godiva" (US #6), "Knight In Rusty Armour" and "Sunday for Tea."