Roleplaying On Social Media Addiction

Hi guys, I'm new here. I want to share my story, I think I do have social media addiction especially it's an addiction of roleplaying as fictional character. So like, I write story, replies as this fictional character I really like from a game. I know it sounds silly, right?

At first I had a lot of fun roleplaying with friends, I made some good online friends. But then this one friend who I really trusted betrayed me by taking my place. So they created a new account of the same character that I roleplayed as, without telling me. It really upset me because, they used to be my roleplay partner, but there they were, playing as the same character with no partner, freely interacting with their fans. On the other side, they told me they needed a break. I wasn't suspicious at all, of their sudden need of break. But then it became more frequent, they're rarely online on the account that was paired with me as their partner. I feel really mad, it still upset me until today. How they took my place like that, how they outshined my spot. This whole drama caused me to leave that roleplaying community, but even after months of break from roleplaying, I still feel sad until yesterday. Thinking how they gained a lot of popularity, how those people supported him without knowing they're a bad person. Roleplaying was so much fun.. I even think of returning again after what happened to me but then I realized it's better if I completely leave that hobby forever. 

And what makes me feel so sad, is that everytime i look at that fictional character, I got reminded of them. I remember their betrayal again. But i still love that game character, I really love it. I'm having a really hard time to let go, to leave roleplaying , the thing that I used to love 😔. How do I move on completely? How can I love that character without constantly being reminded of what happened?? Thanks for hearing my story, I'm hoping for some advice on letting go ❤️