wat should i do?

well, i think bạn should talk to him, stating that bạn are a little hurt that he didnt offer to take you. ask him if bạn can meet this friend, and maybe ask why he would prefer to bring someone else over you. try not to be too upset. remember to talk calmly in order to get a response from him.
good luck!

Ok so honestly I think bạn should talk to him and tell him that you're a little hurt ask him who he's taking. Give him time to talk and do not under any circumstances jump to conclusions. When he's done talking think about what he's đã đưa ý kiến then make your judgement. I mean he's probably taking a friend he's might have known for a while and hasn't seen in a while hoặc it could be a cousin hoặc something. Hope this helps!! :)