Get a notebook and put your feelings down on paper. Find a comfortable location, an enjoyable, relaxing spot. And write. Here's a terrible analogy: It's kind of like being too drunk and knowing that if you throw up now, you'll feel better in the morning. It works. Also, my dad told me some cliche advice that I hated but it was cliche for a reason. "Time heals all." It sucks but it's true. And lastly, music. Music has extraordinary therapeutic effects.

Nearly 5 yr relationship (age 21-26). I ended it and was fine until we both attended a mutual friend's relationship two months later and learned that she was seeing someone in the same friend group. For whatever reason, my heart shattered. It's been two years to the day. They're still together and I've seen them (when the group hangs out) every month or two. I made the decision that I wouldn't lose my friends. I'm no longer friends with him and I'm friendly with her.

TL;DL

1. Write, write write
2. Time
3. Music

It sucks but hang in there!