Love recognizes no barriers. It jumps hurdles, leaps fences, penetrates walls to arrive at its destination. I know you're confused now but be hopeful.
You can change any situation by changing your attitude toward it. Happiness comes from holiness. You can't truly be happy unless you're hungry for Jesus Christ and willing to completely work on you. Focus more on you and watch her go into self destruction. Trust me, she'll be back, maybe for closure or wanting you back. No one knows when but work on you to be in a better place when that day comes.