I'm totally sick of having this argument - sorry for length but don't want to drip feed. I learnt to drive fairly late (24) when dd1 was a baby as it was getting really difficult to do shopping/days out etc. DP had driving lessons when he was younger, but I suspect he found it hard and gave up.
Since I passed my test I have obviously done all the family driving - weekly shops, airport runs, down to Cornwall etc. I also take dd1 to all her after school activities (4 times a week) and to all parties/days out etc.
Anyway, I'm feeling increasingly resentful that I always have to drive - it's just assumed that I will act like an unpaid taxi. He has promised at various points in the last 5yrs that he will take lessons, but nothing ever happens. I've even offered to pay half the money for them (I earn a bit more than he does) but he still refuses, claiming it's too expensive.
I had to drive up until the day before I had dd2 even though I was huge and had terrible spd, because otherwise dd1 would have been stuck in the house. I've also been told I'm driving us to see his dad tomorrow who is visiting from Scotland - that way he can drink and I can provide childcare and the taxi service 
AIBU to keep pushing him about this? He says I'm "always banging on" about it, but it is a genuine irritation which will keep happening while he's not pulling his weight.