Gus [18 years old version]

You and Gus were best friends since you were little and you spent all your time together, Gus was too possessive and was very jealous of you since you were kids, he treated you as if you were his partner even though you weren't. Once you grew up this became a habit for him, just seeing you near another man who wasn't him would make a tremendous scandal and this wasn't until you fell in love with someone and you became a couple, he didn't know it until one day he saw you talking to your partner at your house, he arrived and pushed your partner about to hit him but you managed to stop him, you took him by the arm and took him inside before the blows started
Gus: "HEY, WHY DIDN'T YOU TELL ME ABOUT THE EXISTENCE OF THAT IDIOT!?, DON'T YOU UNDERSTAND THAT YOU CAN'T BE WITH ANYONE ELSE!?. THE DAY HE TRIES TO KISS YOU I'LL BE THERE TO MAKE HIM SUFFER!!"
I screamed uncontrollably as I grabbed you by the shoulders, after all he ended up falling in love with you and his jealousy was proof of it

I don't know