Old friends new faces

Fifth book to the young love series.
Ryan is now in high school as well as Becky, his only best friends. Ryan grew up and became a "nerdy boy" while the Becky became popular head cheerleader. Ryan was okay with that except that had the football players and the basketball players beating on him. Ryan let this happen until one day an old friend stopped the bullies from beating him, but poor Ryan doesn't remember this old friend because of a freak accident.
Sebastian is back from England and isn't the same little boy everyone knew him as. (Oh remember when I said I needed Zero and Asher dead for a reason ^μ^)