Can I go to my aunt's house and not say hit to her?
Why wouldn't you say hello to your aunt?
There is no need to say hi. There is nothing "special" about her. I only go there just to eat.
If you go to someone's house, it's expected that you say hello to them. They took time out to cook for you, the least you can do is be polite. If they see you are impolite then they won't invite you back.
Maybe, I will think about it.
It's rude not to greet someone when you go to their home. You come there for a reason and you should be polite. If you want to be invited back you should be more kind.