lots of drugs and alcohol . also stay busy . loneliness will drive you nuts if you let it . take a class , or hit the gym or go for a hike or go watch a movie or whatever . do something . check meetup . com to see if there are any local people who have similar interests and hobbies or find a new hobby when you find yourself thinking about the ex , stop . Don ' t allow it . Stop and remember something bad , a reason you broke up . Even if they left you , there ' s always something bad you can focus on to snap yourself out of the ' ooo i miss them ' bullshit . So don ' t think about them . If you do , think bad things . Hell I still say ' hope that walking petri dish is dead ' when one of my exes from 10 years ago pops into my head .