Quick Spinach and Tortellini Alfredo

This is a great dish in under 30 minutes, perfect for one of those crazy busy nights.  The flavors are just wonderful, combining together in perfect harmony.  Enjoy!
-20 oz three cheese tortellini
-5 slices bacon
-3 Tbs flour
-2 cups milk
-salt and pepper (about 1 tsp each)
-1/2 cup shredded Parmesan cheese
-2 cups baby spinach, roughly chopped
Cook tortellini according to package directions.  Drain and set aside.
Meanwhile, chop the bacon and cook in large skillet.  When crisp, remove onto paper towels.
Return skillet with bacon fat to the stove.  Add the flour and whisk until no lumps.  Whisk in the milk.  Add the salt and pepper and mix well.  Cook, stirring constantly, until sauce begins to thicken, for about 2-3 minutes.
Stir in the cheese and mix well.  Add the spinach and cook until wilted.
Add the cooked tortellini and coat evenly with the sauce.
Remove skillet from stove and top with reserved bacon.