The Tension of Opposites by Kristina McBride

Tessa is shocked when her best friend Noelle returns to their Ohio town after she was abducted two years earlier. Tessa knows she and Noelle cannot resume their relationship as if nothing happened, but she isn’t prepared for the changes in her friend, beginning with her new name, Elle. As Elle tries to reclaim herself, Tessa has to do the same, but getting involved with Max, who pushes her to see that her devotion to Elle might be unhealthy, makes matters tense. The author uses a photography assignment as a throughline and as a device to illustrate character, the binary opposition that is simply human.

Disclosure: I asked the publisher for it because it seemed like a good combination of suspense and light romance, and it was.