It wouldn't mean around four hours? Or AIBU?
This will be quite long but I don#t want to leave information out.
I am an oldie on here but I've changed my name in case anybody recognises the situation who knows me or her-I don't know whether to call her DP as we don't live together and haven't been seeing one another very long.
We met at work when I was on secondment in her area but I live around 2 and a half/three hours from her and we decided to just see what happened and if it worked we could look at getting a place together.
There was an event in a town near her this Saturday just gone that we both fancied going to so she invited me over for the weekend. IIf I visit I normally just stay Friday and Saturdya night but this one, I told her that as I had the Monday off too this week, maybe I could stay over Sunday night and we could do something Sunday too?
She said yes that would be good, but that she was doing her hobby that day, but that she'd only be gone a couple of hours. She offered to not do it but I said no, that's fine, I don't mind being left for a couple of hours. She lives in a lovely place and I would just go to the shops or go grab a drink somewhere and read my book or whatever (or hang about at hers, weather/mood depending).
We go to event on Saturday, all good and on the way back we stop for a drink, and I ask something like 'Okay remind me about tomorrow, when are you leaving and coming back so we can plan what we can do' and she said she'd be leaving around 12:30pm and back around 16:30 pm.
I was a bit like 'WTF you said you'd be gone a couple of hours and that's 4?! She said 'yeh a couple of hours' I said no, a couple of hours is two hours! I can easily kill a couple of hours at yours but not 4! We argued
although not a 'heated' argument as I am a very 'cool' person and don't like to argue but in the end she said 'right I won't go then!!!' And I said no, you go. I think that if she DIDN'T go she'd tell her hobby friends that I had stopped her or told her not to and I don't want that 
I am really quite annoyed. Feel I am worth a bit more than that-if she's going to have me over she can't be gone out for the best part of the day (and a quarter of it) I'd also never do that to her.
She continued to argue that a couple of hours doesn't have to mean two.
She also kept explaining things like 'well the thing at hobby takes two hours but I've got to get there and back and that takes X amount of time and then I have to be there a bit of time before and then we have to do this afterwards....' etc etc and I said none of that is relevant! You said a couple of hours and you meant four!
I tried framing it to her that if her work asked her to stay behind for two hours, and she agreed but then they expected her to stay behind for four, would that be okay? She said 'Wouldn't bother me!' so I said well you'd just do four hours woudl you?
She said no!
I asked if we were a couple and she says yes, and I said 'well how many of us are there!!'
As it was, I came home today
I felt quite unwanted and unappreciated. It's quite a long drive, and I was looking forward to another day with her. I didn't mind two hours, but not four.
I have no idea how this thread is going to go!
AIBU to have left?
AIBU to feel unwanted/unappreciated?
AIBU to think that 'couple of hours' means two hours (obviously with a bit of give and take, I'd not mind if someone said a couple of hours and it turned out to be just under or over).
AIBU to think It's rude to have someone be with you for the day and then bog off to do something else for a lot of it, leaving them by themselves in a town they don't know? At least without telling them the truth about it?
I'd never do that and I told her this-to which she said that it wouldn't bother her if I did.