MY ONLY LOVE is an achievement in Spintires
How to unlock
Finish a level with each Vehicle travelling less than 20 meters in Single Player mode
NOTE: This should read: "Finish a level with each Vehicle travelling less than 20 meters in Single Player mode EXCEPT ONE"
Basically use only one vehicle to finish a level.
Although technically you are allowed 20m, it is better to play it safe and not touching any of them.