Go out with good friend roughly every three weeks or so - usually local ( around an 8 mile round trip) I seem to be the one who always drives ( going to hers means around a two mile detour ( four mile round trip ). Right at the beginning she used to offer to pay for half my meal or cinema ticket or parking ). For months she hasn't offered once. I didn't mind at first but now it's starting to niggle me. Feels a bit awkward and I don't want it to affect our friendship. So, wwyd?