1. You dream that you are married to your girlfriend, which means that you love her very much and hope that you will get married.
2. You dream of getting married at school, which can only explain two things. First, you have been under a lot of pressure recently, and second, you are successful in your studies.
You dreamed that you got married in the canteen. Does this mean you are hungry? Or it means you have unexpected wealth.
The above is my opinion.