Name change as some sensitive info.
Backstory: Been friends with A for a few years but got a lot closer within the year. She has always known that I grew up in foster care but only details of that more recently. I've been separated from X for 5 years (DD is 10) and he was emotionally abusive and I've told A more details of that over the last year and she's been really supportive.
For my birthday in October 2020 she took me out for lunch which I was really touched by. She forgot to bring my gift with her and posted it to me a few days later as she was unable to meet. It was lovely, really thoughtful and with a nice card. Her next birthday was in March 2021 and I posted her a gift as we were under lockdown and she was really enthusiastic about it.
As our friendship developed, I told her about how X wouldn't get me anything for my birthday (not even a card) but expected me to go all out for him. He always told me I didn't 'deserve' anything and that really affected me. I was with X from 16-30 so this went on for years. I started to really dread my birthday because he just made me feel like crap.
About a month before my birthday A told me she had booked 2 days off work for it and I arranged to have DD stay with X that night. Then a few days before my birthday, A text me to say that she couldn't think of anything we could do together and she was just going to go to work instead. I was pretty crushed but didn't say anything. I expected to at least get a card through the post but no, nothing.
I have seen her since as I thought maybe she was waiting until I saw her in person to say something and she didn't mention it.
Our friendship seems to be the same as normal but I just don't understand what happened. Her birthday is next month and I'm not sure what to do.