As someone that is old and washed up and decades past my prime I just want to warn the younger runners of the pitfalls that come with "Going All In" and tying up so much of your identity and self worth with the sport.
There is nothing much more sad than the "peaked in HS" guy or the dude that still talks about or sulks about the HS ball game years and years after. It's cliche, but the trope exists for a reason. There are plenty of grown men that struggle to remember their kids birthdays but can detail, play by play a HS football game from 1985.
Regarding our sport of running, I think it may even lend itself to this phenomenon even more since it is one of the few sports in which you can still compete well after HS or college. Sure there are beer league baseball games and rec league basketball, but for the most part it takes huge effort to continue to participate in a team sport. Because running is a solo project you can continue on, and while this can be a good thing, I think it can really enable the Peter Pan Syndrome as well. The ball player is FORCED to give it up and move on to other things, the runner is not.
I look around and see so many guys that turn this sport into their One Big Thing, and then once they can no longer compete they are left scrambling to capitalize on this somehow, someway. So you see a frantic move to get into coaching, blogging, videos, running store owner/employee, you name it. They spent all that time running and they are just in too far now.
My advice to the collegiate runners is to go all in and maximize your fitness and compete while you can, but keep your eye on the prize. The goal is to use running as a way to get your degree and become something great, something professional, the "something" is completely unlimited.
Don't limit yourself and your focus on this sport. Use the sport, dont let the sport use you.