It is a bitter, somehow sweet thing to again say goodbye to someone you once loved. It is a good thing to let yourself do this. To feel the wave and weight of the emotion. It is honoring; of yourself, of her, and the moments you had together. The tears are healing, so let them flow when they come. Let your emotions be what they are, there is no sense in fighting it. You say goodbye not because you want to, but because you know deep down that it is what’s best. There is a peace that comes with that. And I don’t want you to miss it.
Perhaps this is the true heart of all emotion. The choice to simply feel it, all of it, is a window to real joy and adventure anew.

“You make known to me the path of life; in your presence there is fullness of joy; at your right hand are pleasures forevermore” — Psalm 16:11
P.S. You are not alone. There is a purpose for your emotion. I believe that God gave it to you for a good reason. And, I’m finding that maybe one of those purposes—rooted in the deep compassion of Jesus, who experienced them too—is to draw you into His very heart.