Dear __________,
It was wonderful that you were able to join us for our house warming party. After renting small apartments for so long, we are thrilled to finally have a house that we can call our own. And just having enough space to throw a party for our family and friends is such a good feeling. Thank you so much for celebrating with us, and for the bottle of champagne and the bouquet of flowers. We are lucky to have you as friends.
(YOUR NAME HERE)