Jacomus,
Just seen this. What I would have said, after your earlier post, is, Then keep yourself alive and don't go the way that tempts you! This sounds like an order, sorry, it's meant to! Because you owe it to those loved ones whom you so tragically lost. As long as you are there to have your memories of them, a little bit of them stays alive in your mind. You are there to survive for the sake of the others who didn't. As a committed Humanist these are my very firm views, but others of different beliefs feel the same, I am sure of it! Whilst one is around to have memories of another deceased person, that person lives a little - in you.
If as you say you self-harmed yourself yesterday, this is not something to beat yourself up over, to agonise about. There are other people do this, you are one of those who finds expression in this way. The fact that you did so in such a way as not to take yourself from us, you have shown the courage which you deserve to show. If you find the way to come out of this way of showing your feelings, of course well and good. If your present g/f is as you say she is, she will support you.