The biggest lesson to learn my younger self would be that Life Goes On. You may think that what you're going through right now is the worst thing ever and you'll never survive it, but you will. I promise you will. I would also tell my younger self to take that trip to the seaside with my grandfather, when he was still here. There is never enough time to spend with loved ones, fight less and love more, it's more important than you'll ever think possible.
What would you tell your younger self?