What do you hope that your friend will do? I know that going to the authorities is a big step and everyone's been saying it here, but you haven't replied so I think maybe you're rejecting the idea. If there are smaller steps that can help you, then sure, you can take those steps. But what is it that you hope for your friend to do?

If you're not sure, and just want someone to help, there are some intermediate steps you can take. Like calling a helpline and talking about it. Maybe the person on the helpline can encourage you with a sense of direction. Or tell a teacher, or school counsellor (they are obligated to help you).

You can tell a friend in a note, or say that your dad has been doing in appropriate things. I don't know what your friends are like, so I'm not sure what kind of response that will get. To be honest, not all people will respond in an ideal way. So telling a teacher or counsellor or helpline is the safest bet.

But you really need to do something. Even if it's hard or even if it doesn't make the problem go away completely, doing anything to change the situation some will be a good step, because the status quo is bad. And you shouldn't allow yourself to get used to it or to tolerate it.

You can PM me and we can talk about what you can do. I won't push you to report him.

-------
i spy on you too