Combine milk, flour, salt, and pepper, stirring with a whisk. Add milk mixture to pan; cook over medium heat 3 minutes or until thickened and bubbly, stirring constantly with a whisk. Remove pan from heat; add cheese, stirring until blended. Add milk mixture to shrimp mixture; stir until combined. Add pasta and 1/4 cup parsley, tossing gently to coat. Transfer pasta mixture to a platter, or divide evenly among each of 8 plates; sprinkle evenly with remaining 1/4 cup parsley and crumbled bacon. Serve immediately.