"Před týdnem ji miloval."

Translation: A week ago, he loved her.

[JohnBraga1]

sad!

[dsarkarati]

This is an unnatural English sentence. What does it mean? He loved her then, but he doesn't love her now?

[ion1122]

I think the English sentence is OK. It's the situation the sentence is describing that is unusual.

[vor23]

I think it depends on the context, and it need not be negative. Imagine this conversation:
Q: You two seem to be getting close. Do you love her now?
A: I loved her a week ago. And now I love her even more.

[AgnusOinas]

Yes, there can be an unspoken "already"/"už" hidden in both the English and the Czech statement. :) So it doesn't necessarily have to mean "He loved her then, but doesn't love her anymore."

[folshost]

Is this the same as saying "A week ago he was in love with her"

[endless_sleeper]

No, although the meaning is quite close. "To be in love with" is "být zamilovaný do + Gen".