It's so hard to let go once your heart is convinced you are in the right. Even if all logic tells you there's nowhere to go but deep down in that dark place where loneliness, sadness and pain lives. Once you are overcome with emotion, emotion so deep it has physical symptoms, it's almost impossible to give up without fighting for what you want, what you believe in. You no longer worry about how broken you will be if you don't succeed. You no longer think about how empty you will feel. All that matters is giving it your all.
Enjoy the moment, don't think about the past or worry about the future. Enjoy the here and now. This is your life, live it so that when all is said and done you won't be left with the thought of 'what if'.
God has a plan for all of us, and he promised it would be for good. Think on that.