"I never get a happily ever after..." (GxG)(๑'•.̫ • '๑)

story talks about a Side character who is friends with the main character, although the main character gets everything she wants her best friend is left lonely...the side character hides her pain from family and friends,in order to keep a healthy relationship,how long do you think it will take until the side character bursts?

WARNING:
some sexual content
tough language
mentions of depression or ocd
self harm
suicide
YOU HAVE BEEN WARNED ⚠️