While the spaghetti is boiling, add olive oil, garlic, and 2 tbsp of butter to a pan. Cook on low until garlic is fragrant.
Strain the Spaghetti and add it to the pan.
Add the rest of the butter, and using tongs, turn the spaghetti over to coat evenly. Add salt and pepper. (Optional: Add extra garlic salt or crushed red pepper to taste in this step.) Then add parmesan cheese.
Plate the spaghetti. Then add chives and add extra parmesan cheese.