Lyric discussion by postmortembella 

Cover art for My Love lyrics by Justin Timberlake

The arrangement of this song and TI's part lead me to believe this song is more about courtship/seducing a woman with words. I would say it seems Justin is describing the experience of meeting a beautiful woman, and wanting her to be his, mostly in a sexual way. The things in the song ( what if I wrote you a symphony, love note, etc) are the things he would say to try and seduce her with his words.