Best friend and I have always been like chalk and cheese, but I have no family and she's always been like mine.
She has three kids, and got married and divorced before we were 20. She gave up college, learned to drive and got a house. She was exciting and threw crazy house parties and nights out.
I did college and uni, worked a full-on corporate career for a while, moved abroad for work, came back and started a company that now employs a few people. I'm a lot "duller", I suppose.
She's always been quite head-strong, and it's always been her way or no way, which was fine when we were younger. She hated my corporate career, stopped talking to me entirely for the year I was abroad, and has always hated my business. Her headstrongness is a big cause of anxiety for me. That has been worse in pregnancy, as I can't medicate it.
But she's my oldest friend, someone who has always been there, and I like her a lot.
The cracks started showing four years ago, when I got engaged. She was over the moon for me, but had a big fight with her partner about why he hadn't proposed when we met up... and then later said she didn't want to get married. She was difficult about my wedding, took over a lot and hated how low-key it was. She left early, but gave a lovely speech and seemed happy for me. She didn't talk to me for a few weeks after it.
I'm now pregnant with my first. I organised a nice way to tell her, at an event that she wanted to go to, but she cancelled the day before. I told her on the phone, which she complained wasn't 'special' enough.
We've had a stupid non-argument about a birthday event four weeks ago. I organised something easy, she couldn't go, she changed the booking to another time that I couldn't make, and neither could other mutual friends. When I said we'd leave it, she sent me a long message saying she felt I didn't care for her anymore, and she had thought better of me than behaving how I am. I didn't reply.
It's now four weeks later. She didn't get in touch on my birthday, we're in groups together but haven't said anything to each other since. She's told other people that we've fallen out. Most mutual friends have made contact, one has not.
As far as I know, she doesn't want more children, but she's generally stopped confiding in me recently so I don't know for sure. I'm very low-key and hope I haven't rubbed anyone's face in anything. Most people don't even know that I'm pregnant.
My instinct is to do nothing. I'm okay... It's pretty crazy at the moment anyway, my business is insane, we're moving house, I'm pregnant and dying in the heat 
I miss her, but maybe we've just grown apart...
But I'm wondering if I'm being short-sighted? I do have GAD, and bipolar, and although I feel stable, I wonder if that might affect my view, and I'll wonder if I should have tried to 'fix' things later down the line.