Bring a large pot of salted water to a boil. Add spaghetti and cook according to package instructions until al dente.

Drain the pasta in a colander and set aside, reserving 1/2 cup of pasta water.

In a skillet, heat olive oil over medium heat. Add minced garlic and sauté for 1-2 minutes until fragrant.

Reduce heat to low, then add cream cheese and heavy cream. Stir until smooth and combined.

Gradually add grated Parmesan cheese, stirring until melted and creamy. Season with salt and black pepper.

Add the cooked spaghetti to the sauce, tossing to coat. If the sauce is too thick, add reserved pasta water a little at a time until desired consistency is reached.

Serve immediately, garnished with chopped parsley and additional Parmesan if desired.