Does anyone else feel this way?

Am I wrong for feeling left out because I don't have a child? My cousin is a mom, of a 1year old. And pregnant again. I feel like we have nothing in common anymore since she got pregnant. When she talks about the baby and I chime in or say something she tells me "you don't know anything about this" it tells me "babies are a huge responsibility, you don't want any" well why are you pregnant again! Her child hates everyone but her. I've been trying for 2+ years to get pregnant and I've had 1 miscarriage and 1 chemical. Both my cousin and I are 20. So it's not like she's 30 and so much more knowledgeable. I've taken care of so many infants. I'm a baby & kid person. She wasn't but was forced to when she got pregnant...sorry about venting I just want to know what you guys think. Have any of you felt this way?