Is it okay if I just say "My friend named"? or should I complete the sentence to "I have a friend named". Thanks in advance.:)
There's a whole bunch of choices here.
(normal, everyday): My friend James says he loves verismo opera. He's a known liaer.
(slightly pedantic): My friend, whose name is James, says he adores verismo opera. That's probably a lie.
(deliberately chummy): My friend, [by the] name of James, says he can't live without verismo opera. He's a lying, conniving jerk.
(overly formal): My friend, named James, says he knows how to appreciate verismo opera. I'm sure he's lying.