Promise Me This is the 4th book in the Between Breaths series by Christina Lee. We've seen bits of both characters in previous books, as they are part of the group of friends centered at Raw Ink. Jessie is one of the receptionists and Nate is buddies with Bennett. An unexpected overnight trip pushes Nate and Jessie to step over the line of friendship, but it also opens up wounds that neither Nate nor Jessie are sure they can fully heal. 
 Though Nate doesn't have a tattoo on him and Jessie is continually experimenting with the color of her hair, they build a friendship full of easy banter. There are so many things that seemingly make these two opposites, but neither are concerned with those differences, nor do those differences run much deeper than the surface. 
 Even their families are a study in contrasts. Jessie's family is so supportive and caring, with each member encouraged to follow the dreams that make each person individual. Her mom was one of my favorite side characters with her calm, perceptive nature and wisdom. While Nate's family is so concerned with outward appearance and keeping the family secrets. There is a palpable current of tension and fear whenever his family is together. 
 Because Nate and Jessie started out as friends, this isn't so much a story of their developing relationship, but a story of Nate coming to an understanding about himself and his past. He didn't have the easiest childhood, though by outward appearances he had a charmed life. Nate is so terrified of becoming his father, that he refuses to acknowledge his strength and urges, instead keeping himself distant and unaffected when it comes to women and the future. 
 Jessie is the perfect person to challenge Nate's habits in avoiding intimacy and relationships. Because they began as friends, she can see the parts of Nate that he refuses to acknowledge himself. But she also has to balance just how much of herself she is willing to give, especially as it looks like Nate will never be able to give all of himself. 
 While I haven't read the first two books in the series, I did have a bit of background from Whisper to Me, and loved to see Kai and Nate's relationship a little bit more. The couples from the first two books pop in and out of this story in a natural way, as they are the friends and coworkers of Nate and Jessie. 
 This was a great story of self discovery and exploration. Jessie and Nate make great friends to lovers with off the charts chemistry and connection. 
 I was gifted a copy in exchange for an honest review. This review is also posted at Reviews by Tammy and Kim.