bootleg friend
(n) A person who you may tell to their face they are your friend or a person who you don't actually like/trust for whatever character flaw. They may be in your friend circle but on a one-on-one basis they are not a friend to you. However you keep them around because for whatever reason it may be, they help you in some way.
Jim: Why do you chill with Eric? I hear he snitched on Kenny. Plus he's kind of a dick to your sister.
Greg: Because he can get me alcohol. He's pretty stupid so he doesn't know I hang with him just to get me drinks. He's just a bootleg friend.
Greg: Because he can get me alcohol. He's pretty stupid so he doesn't know I hang with him just to get me drinks. He's just a bootleg friend.