Everyone is conceiving and my fiancé is being unkind to me

I'm starting to give up with my life, I've been with my partner for 9 years and he is 36 this year and I'm 27. I saw someone I knew who is pregnant and only 23 and married, I get myself so upset cause of my depression and I struggle to kee myself together most days, and my partner goes to me I'm obsessed with having a baby.