AITA my boyfriend left me home alone ;-;

I'm so sad. Me and my boyfriend were having a great day all day, he bought me a nice lunch and we went out for a drive, and then we got back to his and he got a text from his friends that they want to hangout at 6 (it was 5:30). He hangs out for 20 minutes and then leaves! I wouldn't mind if i had some notice, but I thought we were going to have a lovely evening together.

What should i say to him????????????/?