There are so many different types and brands of wine that you may not be able to find one. But the wine specifically to express love there is a well-known winery: Kailong Shijia (Chateau Calon Segur), the icon is a heart, but also has a romantic love story. Depending on the vintage, the price varies from about 1000 to 1500+ for a good vintage. This depends on whether you want to choose. There are sold online.
But such wines are not necessarily suitable for people who don't know much about wine. If you just want to create an atmosphere, you can buy a sweet white wine or rosé, which is good and has a nice color.