Cook pasta according to package directions. Meanwhile, in a large saucepan, saute garlic in butter. Stir in flour until blended; gradually add broth and milk. Bring to a boil; cook and stir for 2 minutes or until thickened. Stir in the shrimp, cheese, parsley and seafood seasoning; heat through.
Drain pasta; place in a large bowl. Add shrimp mixture; toss to coat. Serve immediately.