Friends since high school, very close during our teens/early 20's with nights out, holidaying, sharing everything etc. We were so close.
She helped me out in a massive way by employing me as her PA and things were so so good!
Friend had confided in me that she'd been ttc since they got married (now over 10 years ago) and we'd shed many tears together over it.
The time came for me and my dp to ttc and I told her that we were but didn't make a big deal of it to spare her feelings.
It took 18 months before I got pg, I told her quite early on partly for work reasons and partly because I didn't want her thinking I'd concealed my pg from her due to her still ttc.
Her reaction was mixed, as I expected and we had a few tears together about how it would be her too soon enough etc.
Since then she's changed. She began working from home a lot as my bump became more obvious, which was hard for me (no more long lunches, laughing and chatting etc) but I reasoned it was much, much harder for her to see me about to have a baby whilst wanting her own so desperately.
I went on mat leave and she went very low contact with me, the odd reply to my emails and being very busy if I wanted to visit her. She did call to my flat with cards/flowers etc for my birthday and when my ds was born. Always flying visits but I figured she would be struggling and was grateful to her for her efforts.
She then made me redundant at the end of my mat leave 
Gave very good reasons and by the book etc but it was a blow.
The contact has remained similar but she has 'forgotten' both of my ds birthdays (my birthday is 2 weeks after his and she's called in with flowers for me on my birthday)
Was invited to a mutual friends housewarming last weekend and she was there with her dh.
We hugged warmly and chatted about her work and my new work etc then we were all sat in the lounge, about 15 of us.
Whilst I chatted to someone else I could see my ds trying to show her his toy, she was ignoring him, I could tell that she could see and hear him perfectly well but she just blanked him.
The host called over to her 'the little one wants to show you his toy'
She still didn't acknowledge him, she actually got up and went into the kitchen, her dh followed her. I assume she was upset.
Am I bu to be pissed off with this now? All that's happened since I got pg I've put up with and been as understanding as I can but for her to just ignore my little boy in front of everyone like that, has she gone too far now?