Where have you been (pewdiepiexreader)

I always wanted to do a PewDiePie x Reader! So here it is: Felix fell in love with a high school girl in the old days, But he moved away and separated from her. After a few years, he became a famous Gamer Called PewDiePie. And now He has competition, A Gamer girl called Happy_Monster. (idk) He finally meets her in a party, to be his Old girlfriend, Felix grows feelings for her. But since He has Marzia he's not sure what to do.