That's not surprising. Cha Cha is relatively fast and upbeat, which doesn't lend itself well to the kind of lyrics one might associate with a romantic wedding theme. Nonetheless, you can probably find some resonable solutions if you look hard enough.
Sway by Michael Buble is fairly popular right now. It works well as a Cha Cha, and although it's not exactly a sappy "I want to spend the rest of my life with you" love song, it does have a romantic message. We don't have it on our website, but it's easy to find on Amazon, or possibly iTunes.
You should also browse the music on our website. We have over 200 Cha Chas, all of which have 30-second preview samples. The address is:
https://www.ballroomdancers.com/Music/search_style.asp?Dance=Cha%20ChaRegards,
Jonathan Atkinson