A boy who had a girlfriend kept asking me to prom.

So i dont know if i mentioned this story. So in spanish a boy asked me to prom. Knowing him, he had a girlfriend and was like the Dude in middle school who had asked me as a joke. I said the same thing then as i said now. No. He asked me again and i was like no. He started to ask me again and i asked him "What about his girlfriend" He said he would gladly dump her for me. now i am friends with his girlfriend. I am closer friend with her then him. First thought threw my mind is Aw HELL no. So im like NO. So he asked another time. My Reply; "I`m friends with your girlfriend, So NO" I kept saying no, i was almost bout to say his girlfriend and any girl he dated was out of his league. The teacher realsied what i was about to say and interupted and said she said no leave it at that. So his girlfriend was at the classroom door and was pissed. One of her friends was in the class and texted her about it. Its like, Im looking back at my confusion as to why everyone was laughing and im laughing and finding it hilarious. Welp i`ll see ya`ll later.