Hello
It was really good that you reported the pictures and that they were taken away. That was some really good thinking, even when you were in a difficult situation.
I'm very sorry to hear that your boyfriend has done this to you. No one has the right to make you do anything sexual you don't want to do. What he is doing to you is very wrong and you did the right thing to write to me about it.
What is making you feel like you can't tell anyone? I know it's hard to talk about something like this, but it's important to remember that you haven't done anything wrong. Anything he made you do isn't your fault. A trusted adult can help make this stop - a trusted adult could be a parent/carer, another relative, a teacher, a school counsellor or a youth worker for example.
He doesn't have the right to do this to you and hard as it may seem to share what happened with someone and ask for help, it can be something important to think about. I know that making a decision about talking to someone about what is going on for you can be hard so it's okay if you need time to think about it.
Perhaps you could sign up for a ChildLine account and use the online chat to talk 121 with a counsellor, or if you prefer you could phone for free on 0800 1111.
You don't have to go through this all on your own. We are here to help you.
Take care
Sam