I don't want to drive my girlfriend to/from work sometimes
Is the trip too long? Doesn't she have a working car?
She does, but she wants me to drive her to work. I can't do anything about it, might as well end this relationship.
Maybe your girlfriend just wants to spend time with you before going to work. Talk to her about your feelings, hopefully she'll understand.
It takes too much effort and I am too lazy to drive every day.
Being in a relationship means helping out even when you don't want to. If you care for them, then this is a perfect example to demonstrate your love for them. Maybe ask them to sometimes get a ride from a friend if you feel it is too much of an inconvenience.