I want to cut myself all the time
Why would you want to cut yourself?
The more I cut myself, the more respiration rate goes down and I get less depressed
That is not good.  It is bad to want to harm yourself.
Idgaf it's helping me and I'm not going to cut myself enough to kill myself.
You may not but you may also make a mistake one time. It is bad to harm yourself on purpose. You need to talk someone so this doesn't continue.