Firstly, a huge welcome to RYL, and I hope that you find what you're looking for.
It sounds like you're going through a lot, from your post - but the way that you expressed it was very interesting. It was like, you were looking at both the short-term (i.e. what you were feeling at the time) and the long-term (what the impact was) - that is something that a lot of people, myself included, lack, and really shows insight.
Excuse me if I'm wrong, but it seems that from your post you're saying that you've only really cut twice - is that true? If so, what is it, do you think, that made you cut again last night?
Maybe, you could find some way to help yourself - for example, to feel something similar to those feelings you get from self-harm, without damaging yourself so much? For example, when you say:
Feelings: Calm, happy, floating, ecstasy, satisfaction.
Maybe you could think of other alternatives - a warm bath with some scents? A glass of wine? A decent film? Maybe even sex?
I don't know, but some alternatives to cutting that could help you to feel as positive as you did with cutting, without the negative side-effects.
It seems that your boyfriend cares a lot for you - are you able to talk to him about what you're going through, and does he understand? You said that you are upset - have you tried identifying in what way? It seems from your post that you are aware of your feelings - maybe you could try to write down the feelings you have
before you cut as well, to try and find ways of coping with them? There is
a big distraction list here, some of which I have found to be very helpful, also.
Take care, and look after yourself,
Joanna x