I am sorry about the breakup.... They can be hard... Only time heals the heart, the more you are away from him, the less the sting.
First, get rid of anything that reminds you of him.... Hide that stuffed bear he won u at the fair, throw away any pictures of him, block him on Facebook, delete his number, I know this is hard so one step at a time. You will feel the sting as long as there is a void. Try looking for healthy ways to fill it, hang out with friends, buy a new little black dress, doll yourself up and just walk around your house in heels
Good luck
P.s if you can get a pet