Sometimes I feel so awful that I think about selfharming myself. I don't know the reason for it, is it for taking psychological pain away or to punish myself. Or is it just act I wish someone would see and understand my agony in a current moment. I just know, that in extreme frustation I see different scenes in my head how to harm myself. But I don't do it in real, I guess I might not been in that deep pain or I'm just not that kind of person.
So it might not surprise I'm not planning to seek pain while CTB. For me, thoughs of CTB were a way earlier present than thoughs of selfharm. So in my situation I would think they are separate things. Or atleast I think selfharm would've been first in my head and then CTB if they were somehow linked.
I've always wanted as peaceful as possible way out. By CO poisoning, how I would just fall asleep. Before I searched the methods I did imagine myself just closing my eyes and falling in something deep, dark and unknown.
If the suicide is done by impulse, it might be more similar to selfharm, in that current moment you're just desperately seeking a way out of your bad situation. But if you plan to CTB, you spent time to think about it, research and be somewhat rational while investing time for it, I don't think it is anyway close to selfharm.
Sorry for my horrible English.