Expiry date of a relationship

She was talking to me about her current, ongoing relationship with her boyfriend

"It’s good, it's been very good......but.....I feel it will end at some point, in the not‑so‑distant future"

I felt like she was talking about human life itself

Everyone knows it will end, but we don’t know exactly when, but we all know it will end at some point, in the not‑so‑distant future