Clockwise — Elle Strauss

A teenage time traveler accidentally takes her secret crush back in time. Awkward.
Casey Donovan has issues: hair, height and uncontrollable trips to the 19th century! And now this --she's accidentally taken Nate Mackenzie, the cutest boy in the school, back in time. Awkward.

Protocol pressures her to tell their 1860 hosts that he is her brother, and when Casey finds she has a handsome, wealthy (and unwanted) suitor, something changes in Nate. Are those romantic sparks or is it just "brotherly" protectiveness?

When they return to the present, things go back to the way they were before: Casey parked on the bottom of the rung of the social ladder and Nate perched high on the very top. Except this time her heart is broken. Plus, her best friend is mad, her parents are split up, and her younger brother gets escorted home by the police. The only thing that could make life worse is if, by some strange twist of fate, she took Nate back to the past again.

Which of course, she does.