Maybe the timing was not right. If she had waited a half year more before getting involved with you things may be different.
I had to break up with the lady I was in a relationship with for 9 months after my wife. It is tough on both sides as I knew this lady had big dreams of spending an eternity together.
Give it some time and I am sure the pain of heartache will lesson. Finding love is a grand quest. It will fall in your lap again if you maintain a cheerful and happy outlook.