Woman has a military man (stranger) as a house guest and they hate each other, then love but do not end up together. Read around 2005.

[MICHELE]

I can’t recall much about the book but they did not end up together. I’m pretty sure they were strangers.

[Kris]

Michele, what is the genre (which we need to add to the topic header) - e.g., adult contemporary or historical romance, literary fiction, etc.?

Can you tell us more about the main characters, and why she lets him stay as a house guest?

Story's time period and location/ country?