My GF wants me to pick her up (am I an ass?)

[cbloom]

I have a car, my girlfriend doesn't. We live in San Francisco where lots of people take the trains and buses, which is what she mostly does. However, several times a week she'll want me to take her somewhere or pick her up from work or something. Sometimes I do it, but sometimes I just don't want to and tell her to take the bus. This usually makes her all pissy and whiny for the rest of the day. FYI picking her up isn't like trivial, the traffic in the city sucks and the parking is a nightmare, and I only have street parking at home too.

So - am I an ass, or should I keep telling her to suck it up and get herself around town?