Not fair!!!

Shouldn't you be in a solid relationship before trying to have a baby?!?!? My fiancé and I have been trying to get pregnant for the last year and a half and still nothing(I did have an early MC March of last year). We've been together going on 10 years. I get on Facebook and hear about a girl I went to school with, pregnant with her 6th child, by the 6th guy! And they've already split up! Do some people not care about a child's life anymore??? Shouldn't you want to try and work things out for the child's sake? (And I know it's best for some people to finally go their separate ways after trying, so I'm not trying to bash anyone) It just makes me so jealous that I've been trying for so long, but someone can go have multiple kids with multiple men! And obviously not care.......