that's excellent. the detail is very good, and i like the composition: the heart is just the right size to emphasize its... alone.. .ness. The only thing I'm not sure about is those letters. They're OK now, but perhaps they take away from the empty space around the heart. Great work, anyway.
I tend to agree with za4em9. I think the letters detract a bit from leaving the message open to individual interpretation. The bound heart with the cracks inching toward it makes it a compelling composition. The black and white adds to the bleakness.
I like this a lot. I like the concept very much and the realization of it is very good. I really like the way the borders are very dark with all those cracks, and the heart is very dark as well but surrounded by a halo. It attracts my eye right away. Well done!