Should I forgive him or stay mad for a while because it was his fault?

I was at my sisters track meet earlier with my bro his friend I'm also close with and my family. my brother who's about to go to college and my sis who is 2 years younger r like the perfect kids. They get good grades play sports and are popular and are sweet and grownups love them. I'm the stupid middle child and I'm popular and grownups like me but Im fiesty people say. my grades aren't that good and I feel really sensitive when people compare me to them how im not athletic. Anyways my bros friend was like if kayla gets this wordsearch app shed prob be better than me. (hes four years older) and I was like wow you must be dumb. immediately I said wait sorry don't feel bad I'm not smart either it's ok and I was serious and he says u got a 40 on a take-home test I'm not the stupid one. So I look at my bro like WTF?? Why did you tell him. I don't even know how he found out.I HATE being called stupid and having the person mean it. It's not like idk they r smarter. I don't need to be reminded. I was quiet the rest of the meet and was like crying silently because ppl laughed when he announced. Then when they took me home in the car he noticed me crying in the backseat and he was like whoa I'm sorry. And I was like idc. Then we dropped him off and my bro was like umm I'm sorry for telling him and he was trying to say I can buy you food and you can hurt me and I will tell you a secret about him but I'm like I wanna go home. Now I HATE them but his friend just text me saying 'I'm so sorry Kayla I shouldn't have said anything like that u should be mad' stuff like that and now I'm still upset. I know ur probably like y is she making a big deal about a test but it's that he made it a joke to his friends. Sorry this is so long but I'm usually not this sensitive idk today it just really hurt. So should I forgive him or stay mad for a little more while?