What's wrong with me?

I used to cut myself like a year ago. my boyfriend did it so I didn't want him to be alone so I did it too. I would take a serrated knife and kind of saw my palm. I stopped for about a year. then I dumped my boyfriend and started dating this knew kid but the first guy always liked to spread rumors about me and everything. the stress got me to start again a little every once in a while. I see like this broken plasic hanger that was pointy. eventually I stopped but soon started again. then I took a safet pin and started to cut with that and trace the cuts till they bled just enough to fill the little cuts. i've stopped again hopefully for good but what if I feelthe urge to cut again?