Can I ask my bf to eat like a normal human being?
That depends. Is this about his eating habits?
Yes, he eats so loudly that I have to turn up the music volume to the maximum level
It's not your right tell how your bf should eat food. You have to understand people have different ways to eat food.
But I can't take the sounds anymore.
Then there are other things you can do, like eat somewhere else. You shouldn't tell your boyfriend what to do unless you want problems in your relationship.