Maybe Not by Colleen Hoover

In this book set around the time before and during Sydney's arrival in their life and from Warren's perspective. Warren has just met Bridgette his fellow roommate who is very standoffish and infuriating for him to be around as he not only finds her incredibly hot, they're battling each other in a brutal prank war which results in their bad attitudes between themselves.

Bridgette is a strong female and has life experience that made her that way and she doesn't give in easy to Warren's pursuit of her yet pretty soon their attraction becomes heated and sexual and they can't turn away from it no more, the heart wants what it wants after all.

I really enjoyed knowing more about the two characters that were a big part of Maybe Someday and from Warren's perspective seeing he wasn't just playing with Bridgette after all but really deeply cared for her.