It depends what you mean by "human". If you mean the species, as you apparently do since you exclude other species, then it would be our genetics. However if you mean "Has rights like a human" then self aware is as good of a category as there is. Our ability to ask these questions is direct result from our ability to reflect on ourselves. The ability to reflect on ones self is a component of being truly self aware.
I would also like to interject that despite what some would have you believe we have not conclusively found another animal that is truly self aware. To the best of my knowledge at least. Although this is more of a result that it is actually rather difficult to determine if something is self aware as it requires a line of communication.
The mirror test is often quoted as evidence of an animal being self aware. It makes sense, to be self aware one must recognize the self. However being self aware does not end there. Being self aware means you have the ability to introspectively reflect on your actions and thoughts. This allows us to form the values, and creative hallmarks of our species.
Taking that definition of self aware (which is the definition people use in a philosophical setting) then the mirror test can not be a definitive marker either for or against self awareness. A blind person is self aware, but they would fail the mirror test as they are unable to see the mirror. Likewise an animal may simply not want to touch the dot on their forehead, and this makes the entire test invalid because its impossible to produce a negative result.
Following that train of thought an animal may not be self aware, but possess the ability to model its external environment. This would mean they are able to pass the mirror test but not be self aware. Thus passing the mirror test effectively tells us nothing. Failing it also tells us nothing. One may argue that passing it increases the probability the animal is self aware and failing it decreases the probability. However probability is hardly definitive in this situation.
gamezombieghgh said:
Many birds and mammals experience love, but yes, man's way to use it as a tool or a weapon seems unique, making other animals that love seem to love in a more pure way, ironically.
I'm not sure what you are referring to here. Are you talking about life long pairings of mates? If so I would disagree about that being love, or about humans analogous life long relationships being unique.