Letting go, moving on and coming to terms?

Hey everyone.. Just want some more advice. Always good to hear some feedback. Im slowy coming to terms with my break up after 3 years its been 4 months. My guy basically after all our drama longed out relationship is done and told me to move on, so Im trying to come to terms and leave him be. Its been 3 days sense Ive stopped my annoying obssessed texing, which so far so good.. But i still find myself crying day in and day out, sad, and just thinking of the what ifs and maybe he'll come back one day. I just got a new apt that we moved into together and now i feel it isnt so new anymore and has memories of him in it, Which i did not want. Any advice to help me keep staying strong , and how to make my apt. feel comfortable, new fresh..? I just still dont wanna let go. Its really heart renching. Thanks guys for help