Hi Karla, paint is always an option. They do make stone sealers that can really improve the look of stone that's faded over the years.
Whitewash or paint the mortar joints.
Hi Karla, you can paint it to update it
Please just do a deep cleaning. Once you paint stone you devalue it.. Plus it does look as good as painted brick. Just looks painted.
You can apply new stone, paint, or frame it out and sheetrock it to give it a more modern look.