If I am not mistaken, you want another bird but you want your current one to be your friend -- right? This is a difficult struggle. Sometimes they get so enamored of another fid that they turn their back on you -- literally. Other times they want to claw each other's eyes out, and you have to split yourself between two. and most often, they like or at least tolerate each other, and you have 2 friends.
I think you need to figure out what you want from Birdy. If you love his cuddliness most of all, you might want to keep him single. If the reason you're considering another is because you want double the fun, know that it may not happen.
If you want a 2nd fid so he has a friend, so he's not so lonely, and/or to alleviate his boredom when you are not with him -- you might want to go ahead with it.
My 2 cents.
You can say all this back to me later, as I am struggling to decide whether to get a pal for my parrotlet.