How to cope when everyone around is pregnant but you?

I have been ttc for the past 6 yrs. Some of my friends and family members have had multiple kids since then. It's so hard for me to accept that God has chosen them to have babies, but not me. I just don't understand why not me? I would make a great mother and my husband, the best father. Our dr told us our chances of concieving on our own is less than 1% per month. That is heartbreaking news. My sister in law has had 5 kids and just found out shes pregnant again. What is that? Why her? I just don't know how to cope with everyone around me is pregnant. I hate it! I want to be happy for them, but I just can't. Her husband smokes pot, drinks a lot. She smokes. And their kids are always with my mother in law. What makes them good parents and not us? We don't do any of that. I just need a way to cope. I have no one to talk to that relates to me, cuz everyone is pregnant. I feel like I am so bitter, but it really hard. Any advice would be greatly appreciated. Thanks and good luck to all