true love

Short definition from Wiktionary

Noun

1. 1
   Faithful love: Feelings of love that are adhered to faithfully, or the faithful manifestation of such feelings.
2. 2
   Faithful love: A lover who is faithful to the object of his or her affection or faithfully loved themselves.
3. 3
   Love that is in some sense purer or more unique than ordinary love: The form of romantic affection that is considered pure and wholly positive, not just based on feelings of lust and sex.
4. 4
   Love that is in some sense purer or more unique than ordinary love: The unique individual for whom one feels such affection.
5. 5
   Love that is in some sense purer or more unique than ordinary love: The situation in which a couple is perfectly compatible and there is no better relationship, as set by a greater force such as God or fate.
6. 6
   A thing for which a person feels an intense love.