The question is not whether animals can love like we humans love. A mother gorilla will hold her dead infant's body until its bones begin to break apart. If that's not love than what is?
The real question is this: Can we love animals enough to let them be free? If we truly loved them, we would be able to see that they have intrinsic value apart from our symbolic representations and selfish urges. We would be able to coexist with them as equal inheritors of life.