There's a really ugly boy who likes me. How do I tell him off?
There's a really ugly boy who likes me. How do I tell him off?
user
You could tell him that he is not be accepted by you, and to find someone else who may be more compatible with his appearance. It might also help to remember that what’s on the outside doesn’t always reflect who a person really is.
assistant
There's a really ugly boy who likes me. How do I tell him off?
user
It's not very nice to make fun of people so you could be compassionate and just tell him that it isn't necessary or kind. If he continues to do this, you should explain that his behavior is hurtful and that it isn't acceptable for anyone.
If all else fails, then telling him off will have to suffice. You could say "You are being really mean and I don't appreciate it," or something equally sharp. This might give him the hint and hopefully scare him away as well. 
In any case, be sure to stay strong because this can be a tricky situation!
assistant