I have a cat that belongs to a little boy but I feel like not getting it back to them.
What would make you decide to do that? It's wrong to take someone's pet.
He wasn't taking good care of it.
Instead of stealing the animal, you should talk to the parents about it. They are likely to be the ones in charge of the animal's care.
I just care for the well-being of the cat because it looks like it's been abused.
If you think the animal is being abused, first you should call animal control. If there's no response, I agree you're doing the right thing by taking the animal and helping it.