I hear voices but they are external and rare. For me they usually are very brief. Like the sound of someone laughing. Or once a voice snuck up from behind me when I was in the shower and whispered "HEY!" very loud in my ear (scared me so bad I screamed.)

But, I have what I call "other me." Other me is another me that I talk to. I've had other me for a long time, so long I don't remember when I first started talking to her. She's not a voice. She doesn't talk out loud but we talk all the time, out loud (with my voice) or inside with thoughts. She helps me decide things and goes with me when I'm scared, etc. I know that other me is a part of me but she also seems real in some way. For me, other me is nice to me. We're friends. But, I know some people who have "other me" type things that are not friendly. And like Alice suggested, talking to it might help.