An on again, off again FWB said this to me. I can tell from her tone she meant as some kind of compliment or positive development.

She just broke up with another guy. We've hooked up a few times since. She's traveling every weekend, literally testing the Tinder market in every state with cheap airfare. After telling me about her next trip, she says we should be each other's backups in five years (we're in our mid 20s). What the fuck does that mean? I told her don't intend on knowing her that long.