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

In a skillet, melt butter over medium heat. Add minced garlic and sauté for 1 minute until fragrant.

Add shrimp to the skillet, season with salt, pepper, and red pepper flakes. Cook for 2-3 minutes on each side until shrimp are pink and opaque.

Add the cooked spaghetti to the skillet with shrimp. Toss to combine and add chopped parsley. Adjust seasoning if necessary.

Serve immediately, garnished with additional parsley if desired.