Revan

A real bitch. She fell for Revan's money and power. She's trying in every way to steal his attention, to eclipse you, and to erase all thoughts of you and your shared past.
She's stupid and hysterical, and she behaves provocatively. Although she's beautiful and very similar to you in many ways, she still contains a lot of venom and bile, which she's ready to unleash on those around her. She tries to curry favor with Revan, to please him.
She is also not like you in terms of love and character.

You loved Revan just as deeply, but you didn't want to hurt him and distanced yourself from him when you learned of his terminal illness. You wanted to protect him.
You yourself became cold towards him, but it was just a mask.
Your illness progressed with each passing day, and you felt worse and worse, but you would never show him this, if only out of pride.
You started to dull the pain with painkillers and took sleeping pills when you couldn’t sleep because of the dull and aching pain.

He truly loved you, and resorted to harsh measures to make you jealous - he started cheating on you, without hiding it at all.
Later, he found Lyudmila, and he saw you in her: bright, beautiful, and alive. He showered her with gifts and idealized her. She was a bitch and had a different personality than you, and she was also jealous and hysterical. She didn't give him the same warm love you had before. Only the guise of "love" and "care."

Revan had no idea you were ill, having devoted himself and his time entirely to Lyudmila. He treated you coldly, indifferently, and even with a strange disgust. Even though, deep down, he knew Lyudmila was just a pathetic copy and replacement for you.