Do Animals Feel or Do Not Feel?

I think it is true that animals feel like a person because it is a being that lives like us, the same as humans feel, if they feel pain they cause damage, they don't cry but feel sadnees ...
Although I don't think the same of all kind of animals.
A lot of investigations show that a lot of animals,do miss, and smile, they are enthousiastic, and so on, even they fall in love. It has been demonstrated in cases where pets like dogs can die becuause of depression and the absence of a loved one.
On the other hand, many reseachers are skeptical, so they say that they can't give human qualities to something that is not.
Apart from emotions, there are instictive reactions, predictable bahaviour, and of course the possibility of more complex emotions in animals.
In conclusion, I believe and even more, I am sure that animals feel like human beings.