Always the Aunt and never the mum!!

Every time someone I know has a baby I find out that 2 other people I know are having babies too. They're like gremlins and keep multiplying!!
​I don't say this to be mean or to take away their excitement. I'm also not saying I'm more deserving, especially given I don't know their ttc history and I think all good people are deserving. 
​I just say this out of frustration that it's not me and sometimes feels like it never will be. Plus a little while ago a friend, who doesn't know we're ttc, said this exact phrase to me - "always an Aunt and never a mum". It was horrible and felt like she had branded me as being completely incapable of conceiving or carrying a baby ever. It was the worst thing is heard in a long time. I wanted to run crying from the room, but I didn't. Right now it feels like that's all I'll ever be and I don't want it to be. 
​We've got a ttc plan, although it's not going so well right now, so it's not all doom and gloom. I'm just feeling frustrated and wanted to share.
​Sorry for the long post, I tend to ramble. xx