[header] How to cope with missing your ex roommate [title] Find a hobby! [step] You could try paint-by-numbers or maybe learn a foreign language. Do anything to take your mind off the fact that your ex-roommate is no longer your current roommate. [title] Stop checking his/her facebook page compulsively. 
[step] It just isn't worth it. If you're sitting on your roommate's facebook page and hitting refresh over and over then you are not accepting the fact that he is now your roommate, which only exacerbates the pain of missing him.