The song is a soulful romantic track where the singer expresses deep emotions of love and longing. If this is not the song you are looking for, it could be an older classic, as "Sathiya" is a common term in Hindi love songs. However, given the "latest" tag in your search, "Sajna" from Saiyaara is the most probable match.
Here are the details for the song that best matches your search:
The song's enduring popularity has sparked several modern recreations and covers that cater to new generations:
Here's some useful content regarding the song — covering its latest updates, remakes, and availability.