Cook pasta in a large pot of salted boiling water until al dente.
While the pasta is cooking, heat olive oil in a Dutch Oven over medium heat. Add the garlic and red pepper flakes, cooking just until fragrant.
Stir in the tomato sauce, water, tomato paste, salt, pepper, sugar, and butter. Heat while stirring until the butter is melted.
Slowly stir in the milk, and turn down the heat to low, simmering for about ten minutes. Stir the shredded cheese into the 'soup' until melted.
Drain the pasta and transfer to a large bowl.
Pour the sauce over the pasta, then stir to combine making sure all of the pasta is evenly coated.
Serve, enjoy, and remember to freeze any leftovers to enjoy again for another meal.