hey guys suggest me a book where FL is onesided love with ML

I need a book which contains

-> FL loves ML onesidedly

-> FL is introverted and ML is extroverted treats everyone nicely but is not over his ex

-> with open or sad ending where ML doesnt realize FLs love

-> i hope there is no pregancy or situations like these involved

basically i was rejected so i need a book similar to my situation so i could move on