How do you you use frenemy in a sentence?

Answer 1

Frenemy is slang, and not an actual word so it isn't used by most people in formal conversation. But in slang, it was created (and new words are often created; they sometimes begin as slang and then work their way into the dictionary) to refer to a person who is both a friend and an enemy-- perhaps someone about whom your opinion frequently changes, or someone who is only a friend sometimes but feels like an enemy at other times.

Answer 2

I thought we were friends, but she's been acting like a frenemy lately, making backhanded compliments and spreading rumors behind my back.

Answer 3

We used to be enemies, but now, we are frenemies.