Most Helpful Guy
By realizing that there isn't a "the one". In reality there are probably plenty of people that we are compatible with for different reasons. There are billions of people on this planet so the odds that there is only one special someone is just statistically impossible. Yes humans are complex creatures but they aren't THAT individualistic and complex. Keep this in mind because it will always help you move on from failed relationships. There IS someone else out there that you will be happy with. For now, focus on hobbies and passions and continue to push forward in life.
Most Helpful Girl
It's always difficult to move on when you have been so emotionally invested in someone and have started to plan for the future with that person. Everything reminds you of him and every couple that you see reminds you of that one person. I'm going through that right now. The best thing I have done for myself is go on a trip, I was miserable but then it got me out of the house. Then I signed up for meetup. com to meet people with similar interests. There are no obligations but you begin to see there are a lot of people out there. It isn't much but it is a start. Good luck!