unfortunately your situation happens all to often, it is not your fault and you need not be embarrassed. You should talk to your parents, school councilor or another teacher you can trust. He may be doing it to other girls as well. You can say no and you can stop it. Because of the shout trail being public it will get out I’m sorry.
We have a lot of trolls who make posts in that fashion, they can create a lot of friction etc. The anon function is there to allow you to post and reply to stuff so you won’t get embarrassed etc. We just want to be sure it does not get abused. If your problem is genuine I’m sorry, and I hope you can get the answer to your problem. I just wanted to inform you of the rules