Well its kind of SI but is it a compulsion? If so you are you may have Dermatillomania which is a compulsion to pick at ones skin like scabs and its a repetitive. This is the tricky part for you because you like to see the blood, which causing harm to you so yes its SIing in away. I totally think you need to tell your therapist or pdoc because it can be worked out. The question is it a compulsion? If not then its SIing because you like to see yourself bleed, with some cutters they will cut because they like seeing there blood because it shows them that they are still alive. Of course not all cutters cut for that reason. If you think its a problem you forsure need to tell your pdoc or T. God bless!