If Tomorrow Never Comes

This is not your ordinary love triangle story...

There was a big explosion. And everything went black to Malena. When she opened her eyes, she was greeted by a horrible sight. And there, lying on the ground severely wounded but still breathing, were two people she hated the most:
Heaston, her fiance. He was her first love, her first boyfriend. But he cheated on her and she found out that all about him was a lie.
Sheri, her bestfriend. She was her confidant, her childhood friend, close to her like a sister. But she betrayed her by having an affair with her fiance.
Who is she going to save? Or would she rather just walk away and leave them and save herself instead?
How about you? What would you do?