1.stop trying to forget the person.take it easy even u may not forget some stranger u saw on special occasion but ur significant other has a lot to remember than that one stranger.u can move on by accepting the facts that u can't be together enji "when u try to forget smtn u remember a lot than u do before" 2.stay busy,focus on ur life,find hobbies and believe that there is ntng like "the one" and stop thinking those fantasies you thought you are gonna have with him/her 3.finally if u can make it work,try give it a shot talk to her/him and be with him