I'm so sorry this has happened to you, it's always hard to believe the relationship has ended once it has. Like people have stated, stay busy. Staying busy keeps your mind off of the thought, and keeps you away from feeling really down. My sister was in a relationship with this guy for 2 years, and they were doing so well. Not really sure how it ended, but she's over him now because she found other things to keep her busy rather than crying over the guy she loved. I hope your doing OK, too:( I know it's pretty hard to not be with the person you really like anymore, and I bet you may get that weird feeling whenever your around her because it wouldn't be the same like it was when you guys were together.