I meet an old friend regularly and recently we met for a meal. The total cost of the meal was £90 for the 2 of us. We had eaten exactly the same things but she had also had an extra drink. So when the bill came I suggested we went halves, she pointed out that she’d had an the extra drink so I then suggested she pay £50, I pay £40 to keep it simple. And she exclaimed that the drink wasn’t a whole £10 extra!! So I ended up totting up the exact amounts and we both paid exactly what we owed. AIBU to think she is a bit tight and should have just gone with the flow and paid the £50? We live quite a way from each other and meet somewhere in the middle but I know my train ticket costs more than hers plus she and her DH are extremely well off as opposed to myself who is a single mum who struggles a little financially and get no help from my XH (for our DC’s) which she is well aware of. Furthermore I know that if had been the other way around I would have been quite happy to pay a bit more for my share just to make things easy and less awkward.