I dreamed of having dinner with a girl I like.

According to Freud, dreams are "the realization of wishes". In this sense, dreams are the realization of wishes.

What was your mood when you had this dream! ? It should be pleasant. Eating and chatting together is a very pleasant feeling.

You like her, but reality has not caught up with her, or you are going to give her up. Did you notice your wording "She doesn't mind you sitting opposite her"? In reality, you dare not rashly pursue her, causing her disgust, and you feel a little worried. But you like her very much, so you realize your wish by dreaming that she is your girlfriend, and then you can date, eat and chat together.