Yes, Paris is nice but if you really want romantic cities you have to go to Italy. All Italy is romantic!
Visit little cities in Toscana or Umbria like Urbino, San Giminiano or go to little villages in the mountains of Trentino Alto Adige; if you don't have a love you'll fall in love
Dessert? In Bolzano you can find the real Sacher Torte or Apfelstrudel. Icecream are super everywhere in Italy. Every city has its own special dessert.
Try and see!!