I want him to ask me to semi formal?

tennis43
so I sit next to my crush in English class. We talk everyday and we always make each other laugh. I feel like he flirts a lot but I'm not sure if he is just being friendly or if he likes me. Anyway we were recently paired to work together on a project so I get to see him a lot more. I want to get to know him more so that he would consider asking me to my school's semi formal in about a month and a half. Do you think I have enough time for him to ask me? And if so what are some ways that I could work semi formal into conversation so that he will realize that I want to go with him. If you have any suggestions I'd love to hear them thanks :)
I want him to ask me to semi formal?
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