Take up a hobby or some form of activity you really enjoy, especially things you can do with a group. Don't make any more posts/threads about her and don't bring her up in conversations. If she does come up, move the conversation in a different direction. Do good things for people without being asked, and go the extra mile for others. Tell other people ([i]without being a flatterer[/i]) how much you appreciate them, especially if they do something for you. Investigate music, games, or activities you haven't much been exposed to. Set a really tough but good goal for yourself, like reading X classic books or being able to do Y amount of physical activity. Engage your mind with themes besides romance. Don't do nothing--if you're like me, you'll gravitate towards thinking about her. Don't bother [i]trying[/i] to stop thinking about her. Preoccupy yourself with worthwhile tasks and ideas, and if you're daydreaming, find something real to pay attention to. If you make a habit of thinking about good things, you won't have the time to dwell on the past. I hope that helps.