To love at all is to be vulnerable.
Love anything and your heart will certainly be wrong and possibly broken.
If you want to make sure of keeping it (heart) intact, you must not (love) give it to anyone, not even to an animal.
The secret is here in the present.
...If you improve on the present, what comes later will also be better...
Each day, in itself, brings with it an eternity.
-Paulo Coelho, The Alchemist
"For where your treasure is there your heart will be also"