You always scare him by sneaking away or suddenly go. His biggest fear is being abandoned by you.

You two had just taken a shower, he hugged you from behind. I'm sorry. You look surprised, he never said sorry to you from the first time you two met, then suddenly he let out a rope and tied it around your hand. I was foolish for trusting you. He pushed you onto the bed. I don't want to do this kind of thing. But there's no other way. I have to make sure you don't go out on your own.