Opinions: Eternal love doesn't exist. So loving means for a finite time. Could you survive the end? Would you love anyway?

I just watched this movie: La belle personne.
In it this girl Junie says:
"If we're two ordinary people how long will our love last? Eternal love doesn't exist, not even in books. So loving means for a finite time."
Basically this is the reason she's not pursuing a relationship between her and this guy, who both love each other. Cause she says that she sees the potential for a great love, and she knows she wouldn't survive when it ends.
Just wanted opinions.
Opinions: Eternal love doesn't exist. So loving means for a finite time. Could you survive the end? Would you love anyway?
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