I cut myself for no reason?

i only started cuttin myself yesturday and i did it agen today 3 times on my wrist but i did it for no reason but i feel angry at myself not cuz i cut myself cuz i probly hurt my x gf cuz we broke up today and she loved me its just i wanted to be single and cba to hang around with her and complain if i didnt we went out 3 times before and i always ended it cant remember why but i dont love her i feel as if i should just jum out my bedroom window and die cuz itsthe easiest way out but it will do more harm than good wat should i do and dont say stop cuttin ureself blah blah blah i want advice not a lecture!