Have you ever, given someone a major step up in life, been a mentor, and measurably altered the trajectory of their life for the better?

Gave some advice to a female coworker of mine who was a few years younger than me (we worked in a restaurant and were 25 and 18 or smth). She was in love with her housemate and wasn't sure if it was mutual, afraid of losing the friendship, a classic. Talked for a while and it was pretty clear to me from what I heard that it was mutual. Talked her into taking the lead and they've been together for years now.