Should I Get My African Dwarf Frog A Friend?

Hello! In September 2021 I got 2 male African Dwarf Frogs, Stabby and Pickles. I got them from a toy store, and the manager said they were a few months old. They came in the same tank. I think it was about 2 or 3 gallons. My mom said that she read that they shouldn't be kept together, because one of them would kill the other. So soon after I got them, I removed one and put him in his own tank.

About a year and a half later, Pickles died. After that, I learned how to take better care of Stabby. I got him a 10 gallon tank, a filter, a heater, appropriate plants and rocks, and started feeding him mysis shrimp and beef hearts every day.

My question: should I get Stabby a friend? I've researched this before and the answers were always divided. Many years ago, my dad was gifted 5 African Clawed frogs in the same tank. Soon after my dad got them, one ate / killed all of the others. When I adopted Stabby, he was living in the same tank as Pickles. They never had any problems. I had separated them as a preventative measure, thinking that's what I was supposed to do. Stabby hasn't had another African Dwarf frog in the same tank as him since around October 2021. He doesn't act weird or anything. He sings very often, eats well, and is very active. I've read that ADF are social and should be kept in at least a trio. But I've read other things that say they should each have their own tank.

I'm not sure if I should get another frog to put in the tank with Stabby. On one hand, if they are supposed to be kept in pairs or trios or more, I would hate to be depriving him of what he needs. But on the other hand, he has been alone for almost 3.5 years. What if he is used to being alone and fine with it? What if I get another ADF and Stabby is unhappy? What if I get another ADF and he hates it? What if they kill each other? What if it's a female and they have babies? I want to make sure I'm doing the right thing and taking care of him the best I can.

Thank you for reading and for any advice!

TL;DR: Should I put another African Dwarf Frog in the tank with the one I already have? I adopted him with another one, but thought I was supposed to separate them. He has been alone for almost 3.5 years. Would it be better to get another ADF, or has my ADF become used to being alone?

*cross posted in r/reptiles and r/AfricanDwarfFrog