Face Picking Is RUINING MY LIFE!

Hello, OK, so where do I start..... I have been picking since I was around the age of 14 or 15, but as with a lot of you on here, I can't really pinpoint the exact moment when I started picking at my skin. I remember I would squeeze a spot if I got one, but somehow it developed into dermatillomania and now I squeeze at pores and anything else on my face until it is red, peeling and sore. One moment that sticks in my mind is when I went to my mum's house when I was about 14 and she looked in my ear and said 'You've got a blackhead'. and she squeezed it and got rid of it. I didn't even know what a blackhead was, but this alerted me to it and I then thought, they must be bad I need to get rid of them. So maybe this was the trigger...who knows??? Anyway, I have never been confident in myself and I feel like I am always on a constant search to change myself to make me the 'perfect' person (whatever that is...) I have always felt under pressure to to be a high achiever and to please either my dad or my teachers and a lot of people I know would describe me as 'perfect' but inside I feel the total opposite. I am now 19 and still pick at my face although, over the last year, my picking seems to have subsided slightly. I used to pick at my chest and squeeze the pores, but I rarely do that these days. Maybe that's because I have a boyfriend now who I want to look nice for-he tells me all the time how 'gorgeous' I am, but God I feel ugly. I HATE him seeing me with no make-up. He is the only one I have told about my dermatillomania and he is so supportive, but I want to be free from this!!! I am going into my second year of uni in september and I want to be able to to all my lessons, not miss them because of my face!!! I hated the course I was on last year and it was really stressfull and I picked at my face and missed lessons for it. I don't want it to happen again. What techniques or advice do people have to stop me picking?? Thanks xxx