Hard sci-fi, AND love story

Could you pls advice me hard science fiction with a love story, ideally if main character is female?
Hard science fiction = no new physics. Like, no FTLs, no "laser swords", no warp drives, etc. Interstellar flights, if exist, takes years and years, or even thousands of years.
I'm writing a love story in the hard science fiction setting myself, and want more examples, how to create stories like this ,