You’re not alone, bro. My steam account is at least that old, and zero friends. My PS account is almost as old, and I turned friend requests off there. Solo play is just easier for me as I don’t mind taking things slow and thoroughly exploring an area, or stealth sneaking through enemy territory.
I'm an only-single-player-games type of person as well. I have a group called "Fable Friends" with only myself and my husband in it, but the saddest part is that I made him a moderator – as if it's ever going to need a moderator. 😹
Nothing wrong with going the solo route. Have friends on my list but I kick them off my realm nearly every time they join it because the effers like to blow my builds up in Minecraft 🙄