The action of hurting your body releases endorphins into your system. These endorphins make you feel better. It also crosses us over from emotional pain to physical.

You may be cutting more because you are in more mental pain and need more endorphins but it might be more helpful to find other ways to deal with you emotional issues. Running could be a healthy was to get more endorphins into your system in the short term. But you may need to talk it out with some-one like a professional.

I am glad that your dad is keeping an eye on you. Maybe you could start with your Dad and see what he thinks. He is probably worried about you. Let him show you he cares.