Meta-dramatic irony?

You know that time that happens in every friendship where both of you are getting on swimmingly, and then, out of no where, someone gets a bug up their stinky butt and becomes absolutely enamored of WHATEVER and then that's all that person talks about, like the formula for getting the best price for a used car will unlock the universe?

One of the narrators is doing that right now and it's irritating her only friend. I wish I could tell her to ease up, but she's going to have to ride this out on her own.