If you are asked to your Grade 8 grad, does that mean you are dating?

This guy I really like, asked me to go to grad with him on a piece of paper. For the rest of the day we were kinda close to each other but we didn't speak much. But we went to a BBQ that day and we decided to be on the same team and we won. Then before home time, I went to his locker and I told him yes. My friend who is right beside him, asked him if he was embarred and he said no. So what im asking is just bc he asked me to my Grade 8 grad, does that mean we are dating? or no (how?)