He doesn't "need" is another peach face. It would be nice if he had a friend but you never know if they will even get along or should be allowed in the same cage. Is the bird DNA'd male? Are you looking to breed? Regardless if you plan to keep them in the same cage, it would be best practice to quarantine the new bird for at least 30 days. Worse case scenario, are you prepared to have two birds hate each other and have separate play time?
Your bird can have other species as friends but they should not be in the same cage. Mine loves green cheeks and hates cockatiels, but every bird is different