We have been friends for nearly ten years, we met through work. I was in that job for a while before she joined, so I was a bit higher up than her.
Over the last year or two, I’ve noticed she seems to constantly be trying to ‘one up’ me; and it’s exhausting and unpleasant to deal with. I left that career due to having a DS & not enjoying it much - I’m going to start retraining (in a far better paid profession) this September. I’m really looking forward to it!
When I first had time off when DS was born, she kept constantly bringing up her salary (which would apparently increase every month or so
) and even now she frequently discusses it, and has even compared it to what my new job will pay (once I’ve retrained) - as well as grilling me for details on how much I earned previously in that workplace.
It’s really odd, I have never been a competitive person but I’m almost certain she wants to feel like she is doing ‘better’ than me career wise and financially.
I also found out she lied about a few things - she actually told me before her latest pay rise that she had applied to EXACTLY same training course as me and been accepted - she told me this when I was waiting to hear if I’d been accepted or not, which I was really nervous about! It turned out to be completely made up, I called her out on it and she told me that she hadn’t actually applied, she had just looked into it. 
So AIBU to phase her out because of how strangely she’s acting about money/careers? We used to have a great friendship, but now every conversation seems to end up with her telling me how great she is
I’ve noticed this has only happened since I had DS.