Cheesy Shrimp Tortellini Alfredo Skille

1 pound package cheese tortellini pasta, cooked and drained

1 pound large shrimp, peeled and deveined

3 tbsp. salted butter

1 roma tomato, diced

2 leaves basil, minced

2 garlic cloves, minced

1 tbsp. all purpose flour

1/2 cup heavy whipping cream

1/4 cup shredded parmesan cheese

salt and pepper to taste