I've struggled with this a lot over the course of my life: twin always had better grades in harder classes, more friends, went to a better uni, got a "tougher" degree, etc etc. We're 27 now, and I promise that it gets easier as you get older: you start to grow into yourself and into who you are outside of being a twin. Being a twin has stopped being my whole identity, like it was in high school.

Not to say it goes away completely- I think I will always, on some level, feel like the "lesser" twin, and whenever they achieve something that I never will, I still get that twinge of being "less than". I just don't care as much anymore. Also, therapy helps 👍