It’s okay to hold on to her. It’s okay if you never really move on. It’s okay if you never find that kind of love again because she was the one, and no one else will ever come close. Take some sage advice from someone who knows... threesomes don’t work. If your heart can’t let go, then you will take her with you into every new relationship. And even though she’s dead and no one can see her... they will feel her.