Don’t give yourself a hard time about cutting yourself, I know how you’re feeling about yourself to do this and there’s no need to feel guilty about it… It’s ok, it’s just something that you need to bring back under control and let yourself know that you don’t need to punish or hurt yourself, that there’s nothing wrong or bad about you….
It’s going to be difficult for your boyfriend to hear and he may have difficulty dealing with it and he may draw conclusions about you because of it… All you cna do about that is to try to let him know that it’s not his fault and that you’re still you despite what you may do… If he’s young it may freak him out… Just try to be calm when you’re talking about it and don’t let him tell you anything negative about yourself or force his conclusions about what it “means” on you…
I think it would be a good idea to try to understand why you do cut yourself but if you let yourself get too upset I imagine that will provoke more of it! Be aware that you feeling “good” is the most likely thing that will stop that behaviour so focus on making yourself happy and forgiving yourself and valuing yourself… A doctor may help you do this or a psychiatrist or therapist but if that seems too difficult to achieve right now then just focus on any good feelings you can remember or generate and try to stay within those good feelings as often as you can.
And if your boyfriend leaves you, don’t blame yourself for that. It is his immaturity if he is unable to “handle” the fact that you harm yourself at the moment. It is no judgement on you (or him really, just unfortunate). Harming yourself does not define you, it isn’t “you”, it’s just something you do right now which will change. Remember that it will change.
Good luck….
Love and light,
Ailsa