My teacher won't come to my tea party and I asked him extra nicely. What should I do?

Hi, my name is Josh, I'm 16 and I love all things fun! And there is nothing more fun than a good, old clic TEA PARTY (doiles and all!). This Saturday, I'm inviting my friends to my house for the tea party and I wanted to ask my Indian Studies teacher, Dr. Rucknerb to attend my tea party. I made him a nice invitation and gave it to the secretaries to put in his office mailbox. When I saw him the next day, he said he wanted to talk to me for a few minutes after cl. He told me that he's very flattered that I would invite him to my party, however he is unable to attend parties hosted by students (school policy). I told him that I didn't think that he was being very nice. I ran out of his room, crying and knocked over many desks in the process (on purpose). He yelled at me to pick them up, so I did, eve though I was crying my eyes out. Now, whenever I see him, it's awkward and he doesn't make eye contact with me, which is sad because we used to have such a great relationship. I had a dream last night where we ate chocolate cake together on a big hill, under the shade of a tall oak tree. Then we played frisbee. We spun around in circles and rolled down the hill. However, I woke up, saddened. It was only a dream. How can I right this wrong? How can I make him like me again and come to my party?