Preheat oven to 350 degrees. Grease & flour a 9×5 inch loaf pan. With an electric mixer, cream together butter, sugar, & cream cheese. Mix the eggs in one at a time, & then stir in vanilla.
In a separate bowl, mix together the flour, baking powder, baking soda, & salt. Combine the flour mixture with the wet mixture; add buttermilk & stir just until combined. Do not overmix! Gently fold in strawberries. The mixture will be thick.