I see this song as being about people that used to be deeply in love broke up and to ease the pain go home with the first person they meet hence "fall asleep on the first I face". "Come back to my heart" would be referring to the guy wanting his girl back.
I see this song as being about people that used to be deeply in love broke up and to ease the pain go home with the first person they meet hence "fall asleep on the first I face". "Come back to my heart" would be referring to the guy wanting his girl back.