My friend is late every time we meet or often changes the meeting time shortly before, either bringing it forward by 30 minutes or delaying it by 30/45 minutes or so and is still late!! It’s starting to drive me mad, especially when my 11 month old doesn’t sleep well at the moment and I’m having to try and stick to a good routine in the run up to our planned meet time.
I don’t think I am BU but maybe I am, I think along the lines of...
5/10 mins- nothing to even get annoyed about
15 mins- fine, traffic is unpredictable sometimes, happens to us all on bad days
30 mins- taking the fucking piss now!
She says sorry but doesn’t ever appear to rush, just brazenly walks over with “oh hi, guess who is refusing lunch again”.
I’m really bad with any confrontation so it’s very much a gritted teeth “it’s fine” when she says she’s sorry. But last time really got to me because it’s as if she thinks her DD is the only one with a routine. My DD is 11 months and hers 10. Last time I cut the walk short because I knew she was due a snack back at the car and she seemed a bit
that I went so soon when she’d paid for a couple hours parking. I was very sleep deprived that particular day and beyond fucked off i’d stood in the cold for 35 minutes 
I enjoy her company and don’t want to end the friendship but it’s starting to really piss me off that I never know where I stand.
Do I gently mention it? Or lessen the meet ups to stop me getting so annoyed! Thanks in advance