How traumatic is it for your first love experience to be negative?

CelineBV
If your first love (also your first time) turned out to be a cheater or bad person how traumatic is that?
How long does it take the normal person to recover from that and believe in love again?

This is on behalf of my male co-worker. He just found out his girlfriend and first love ever (the one he planned to proposed on Christmas) had an affair with his childhood friend and is carrying his child. His girlfriend was also his childhood playmate. The 3 of them met in grade school. For him this is a huge blow he can't get over.
Updates
+1 y
He met both of those backstabbers as kids. All of them were 7 year-olds at the time. All of them lived blocks nearby, grew up together and went to the grade, middle and high school.
How traumatic is it for your first love experience to be negative?
23 Opinion