Yes, it's a very good idea to buy a companion for your bird if he gets lonely, if your cage is big enough. But the birds would probably be friends with each other and won't socialise with you that much.
Also, you will have to watch them for the first few days they are in the same cage because some birds may fight.
I have a 8 month old budgie and he gets lonely when i'm at work. i was wondering if i could add another budgie to my cage for him to have a friend when i'm working.
