Rant & Question

So I went to my homecoming game today with some friends and like my mom is SUPER annoying about my boyfriends choices. When I get home everything was fine until she says that my boyfriend is disrespectful and loves his mom more than me because he did not go with me. The reason he did not go with me is because his mom had already made plans to go to a concert with him and so I said it was fine and of course I wouldn't get mad, HOWEVER my mom thinks I'm stupid and should realize he's not worth it because of this. Like wtf?? Is this okay???? Because that seems so controlling if i did get mad. Like why would I be mad ? It's just a football game and like school spirit. My grandma also agreed with my mom. What do y'all think ?