Alienated by Melissa Landers is the start of three book series about a study abroad program involving extra terrestrials. Cara Sweeny's family is hosting one of the L'eihr students, a male named Aelyx.
First Aelyx will spend time in Cara's home and her school. Later she will go to his world. It's part of an outreach program for better understanding on both parts. That any two governments would send their children before diplomatic relations are established is a stretch at best.
The book is told in alternating points of view between Cara and Aelyx. Sometimes Cara's blog entries are included. Cara has to deal with the growing feelings of distrust among her human neighbors and the rising popularity of an anti-L'iehr society.
Aelyx's chapters are more dubious. There is something underhanded afoot. There is also as much xenophobia on his species' part as there is on humanities.
As so often happens in a trilogy, the last act is rushed. The two main characters go from tolerating each other to being passionately in love. Meanwhile, all the stuff that's been stewing in the background has erupted, leaving the book to end on a whopper of a cliffhanger.