I got married at 21, got pregnant with my oldest 2 months later, and had a 6 week old on our first anniversary
 
But, it worked out, we are going on 25 years of marriage come December!
My oldest is now engaged and getting married in June.  He is 23, which I think is young.  He reminds me of my age (of course), but to me it's different (of course).  But, he has been totally self supporting for over a year, working as a manager at a club, while he finishes his degree; his fiance has gotten her masters and is working full time, so they feel that they are responsible and ready.
Honestly, I've been through the seven stages of grief, through sadness, denial, and anger, but I'm now at acceptance

.  They will have to figure things out on their own, just like my husband and I did.  
It's not easy getting married young, but for some it works out.