What two people need to communicate together is more. You and your girlfriend should both be responsible for this. First of all, your girlfriend should be considerate of you, because you feel very tired after working for a day and want to go to bed early. This is very understandable. But at the same time, there's nothing wrong with your girlfriend wanting to take a walk after dinner, and she probably thinks walking with you is a wonderful thing. If you persist this time and walk with her, but at the same time tell her that you are very tired from the day's work and want to go home early to rest, wouldn't it be nice to walk one stop together and then take the car home together? Or you can explain to her the reason why you don’t want to walk home with her this time. It would also be good to take time out for a walk together on the weekend when everyone is off. In short, you are the one who knows your girlfriend best. Since two people have decided to be together, they should understand each other and communicate more, instead of making each other unhappy over such trivial matters. Wish you happiness!