my boyfriend broke up with me

on friday, my boyfriend of almost 9 months broke up with me. i know it’s not long, but this is the first serious relationship i’ve ever been in. he left because he wasn’t happy with me anymore and didn’t feel wanted. this crushed me. my chest hurts, my stomach hurts, i’ve cried myself to sleep for the past two nights. i’m hopelessly in love with this boy. part of me wants to message him, beg him for another chance.. but should i? or should i try to move on?