We aren't actually. Many other animals including gorillas, chimps, elephants, cats, dogs, etc. have been known to show emotion just not necessarily on the scale that humans can and do.
Observed examples include:
Theyre not
Mammals, such as dogs, pigs, cats and humans, have complex emotions such as happiness, sadness, anger, etc. Complex motions are carried out by the limbic system in the brain. Reptiles have a limited array of emotions, such as fear and satisfaction. However, they do not have complex emotions like mammals. Brainless animals, like anemones and oysters, are incapable of processing emotions.
Only humans are affected.
Only humans and animals make voluntary sounds. However only humans appear to have the ability to make sentient speach patterns. Some animals can mimmic human speach and others make sounds that may have use as warnigns or mating calls.
Humans and Chimps are the only animals that are not color blind.
Animals have no emotions. cats and dogs are not happy to see you. they are not depressed. Those are human emotions. There are only a few animals who do have some emotions. like the elephant, or the dolphin and some primates. but overall, animals have no emotions. Humans do, that's why they are animals.
Theyre not
Animals and humans are both in the animal kingdom. Characteristics that animals and humans share are emotions, thoughts, and physical similarities. For example, a humans and animals are social beings who form bonds with family, friends, and neighbors.
They do, it's just that they are unable to be as expressive with their emotions as humans are.
Feelings as in emotions? Not to the same extent we do. They are animals. Only humans have the capabilities necessary to feel the emotions that you and I feel. However, they are capable of some feelings.
Animals have emotions, feelings and personalities just as humans do. Humans and animals share a wide range of similarities, from physically to mentally. Animals also think the same way as humans, they can also plan (For example: A plan to capture prey).
both
No, animals can not speak. Only humans can do that.
No only humans
Humans and some primates are the only animals that get chickenpox. It does not affect other animals such as dogs and cats.
Humans can think and reason. Humans can talk, read and write, invent tools, display unique emotions, and spiritual feelings.
Humans and only humans, at least to my current knowledge.