When a kitty shows the Love stat OFF it can mean 1 of 2 things: either the kitty is now too old to breed (older than 121 days) or someone manually turned the breeding option off through the menu. This will set the Love stat as "OFF" and your kitty eats half of what a breeding cat would, 1 bowl of food would last for 2 months instead of 1.
If your kitty is younger than 121 days, you can turn breeding (love) on through the menu. Left click your kitty and then select the option "Breed" from the menu and then "Turn Breed On". It will take 7 days for your kitty to recover and to be able to start gaining love again. You can alternatively avoid this cooling off period by giving your kitty a Pet Food Recovery Vita available at the KittyCats MainStore.
And you don't need to be sorry for asking!
If you have any more questions, feel free to post them!