I'm sorry if I'm assuming, but others are suggesting that it's you who is struggling at the moment...if that's the case I am truly sorry.
Some advice - I regret the effort I went to at that time to be so happy for others at the expense of my own self-care.
I actually wish I'd pulled back a little, and not asked so much about the baby updates and been as hands on as I was once they were here. With distance and perspective, I can see I was just twisting the knife a bit deeper and it was all a bit masochistic, being "Perfect Aunty Perky" who was "so brave" and could be "so happy for all her mummy friends". I wish I'd said no to a few baby showers that I held back tears through only to throw up in the toilet afterwards.
I wish I'd told more than one friend to please not tell me that sometimes they hate their newborns so much they feel like strangling them when they've been screaming for hours because no, it doesn't make me feel "lucky" to be childless or that I'm "better off".
Or that sending a picture of a positive pregnancy test along with the message, "omg we're so fertile lmao, we've only had sex once all year!!!" to me the same week my long-term relationship that I hoped would lead to kids ended was a real dick move.
I went to so much effort to spare everyone elses' feelings and be so emotionally available to all the pregnant women and friends in the depths of the baby stage while swallowing all of my own emotions...and it made it all much worse. No one was looking out for me, but I was looking out for everyone else and putting on the happy face and being as kind and interested as is humanly possible.
It only got better for me when I withdrew from some friends for a bit, mourned, cried, wailed, raged in private...accepted a childless future. I actually had a nice-ish, childfree (as opposed to childless) time for a bit when I addressed the empty way I was feeling and looked at things to fill my life with that weren't kids but brought me even the tiniest bit of joy or peace. I'll admit, it changed some friendships...but it worked out in the end. The friendships that survived were the ones where we could have the difficult, "ugly", conversations.
Then there was this weird thing that happened, where it just didn't hurt as much. I got the distance I needed. So a scan pic was just a blurry, black and white blob. My heart and arms and body didn't ache when I held a newborn. A period was just a period again. Picking out tiny baby shower/newborn gifts didn't leave me sobbing in a heap. But it only happened because I started putting my own emotions before other peoples and being a bit more selfish.
And then it all finally happening much later than planned was actually a terrible shock and needed a whole new approach than I'd ever planned on because I'd grieved all of that and accepted I wouldn't be a mother. That's a whole other story. But prior to this the hormones had also calmed down, and that made a huge difference. Two years difference was quite literally like two totally different worlds/people. I'd cried all the tears, I'd felt all the bitterness...and I'd moved on.
This is my clumsy way of saying...it's ok to put you first. Don't feel you need to hold all these big emotions in, or feel guilty for having them. Time heals somewhat, either way (though I hope you get everything you want ultimately). It's ok to take a step back...real friends do understand (I promise). Look after yourself. Have a good cry if you have to. It does all eventually get easier.