Cook 8 ounces spaghetti noodles according to the package directions until they are al dente. Drain and set aside.
Melt 2 tablespoons unsalted butter in a large skillet, add the 3 cloves minced garlic, and cook for a minute. Add in 1 cup heavy cream and 1 (8- ounce) package softened cream cheese and whisk until the cream cheese has melted.
Add the noodles, ¾ cup shredded parmesan cheese, and salt and pepper to taste, stir to coat the noodles in the sauce, and cook for a few minutes, stirring frequently.