Do cool shit, and be awesome. Living well is the best way to get over the life you you wanted but will never be. The one constant in your entire life is you, so the relationship you have with yourself is the most important relationship you'll ever have.

So take a solo road trip. See that movie in the theater that you heard was great. Treat yourself to a nice dinner at that fusion place you were wanting to check out. Read and learn about the world. Take a class in that language you wanted to learn. Bake yourself fancy treats. Take on a new hobby. Make art.

To be the kind of person others will find awesome, you have to first become that person; in so doing, the pain of losing that ideal life you are mourning will slowly fade. It will never vanish completely, but over time the pain will become minimal, like rediscovering a tiny paper cut on your finger that you'd forgotten about.