My Jefferson-budgie is Not alone. He has his missus, the Lady Calliope-budgie, and HIS hooman (aka me) and HIS sun-conure (aka, my Sunny), AND he has some youtube budgie videos which are also HIS budgies. Etc. However, along with being Manager to us all, he also makes time to sing-to & preen: one of his food dishes, one tiny little in-cage screw, and a couple other non-animate "friends."
So, your budgie's friendship with his perch is not unusual and probably not a problem.
However, along with getting him a budgie-friend (male!) as soon as possible for you, I'd also recommend making sure he has access to plenty of toys.
That is, if he has made Friends with his Perch, while still having plenty other toys & a reasonably large cage, then I would not be too concerned. However IF he is friends with Perch because Perch is his Only playmate (aka toy), or if cage is too small for other toys, THEN more toys and/or larger cage would be in-order.