I think it totally depends on your cat. If my cat were more of a loner/not glued to my hip, I think I would’ve gotten her another cat to hang with. But she and I are really bonded and I feel like it’s hurt her feelings if I got her another cat. I’ve brought home a few fosters or had visitors and she’s never been thrilled. She’s also partially paralyzed after a stroke and has incontinence issues. I don’t think I could handle another cat myself.
All depends on your situation. Sounds like you might be feeling like it’s something missing from your cats life if you’re thinking about it.