Why? Just why?

Why is it so hard for some to get pregnant and others it just seems like all they have to say is " I want to get pregnant " and boom! They're pregnant!?!? Yes I'm happy for them but at the same time on the inside I'm crying my eyes out and wishing it was me telling someone I'm pregnant. Not gonna give up on my dreams of raising a family of my own either through adoption or natural conception. I guess what I'm saying is it's in gods hands now. Hopefully one day I will have a family of my own.