How do you deal?

My now fiancé and I have been trying for over a year to no avail.

Everyone around me is pregnant now this. From my old best friends to my cousins. It’s hard for me to accept they are pregnant and I’m not because why would someone give a baby to child predator. Why would you give a baby to someone who can’t afford the other three they have. Why give the lady who’s homeless a baby. Why give everyone but me one. My fiancé doesn’t understand it when I burst out crying because someone else is pregnant. I feel so jealous and envious of people I never wanted to be like. And that hurts. Truthfully. I don’t want to even try anymore. But I’d hate myself for stopping what can I do what can I try to not be as sad and jealous with everyone else being pregnant