OP - I think you are behaving pathetically. You know he has treated you with no respect, has used you for sex, and not even bothered to try to pretend to treat you with a bit of friendship (which should make it easier as the pretending to be a friend whilst treating you like shit is a real headfuck). To not delete his number from your address book and block his number from your phone when you KNOW that to be the case is pathetic behaviour.
You are by no means alone in behaving this way - many, many of us have done it and regretted it. There was a long thread on here about 'limerence'. People were talking about different sorts of experiences on that thread but most of them were talking about being in the situation you are in now and how badly it screwed things up for them.
When I was in your position, my friends were supportive even though I was pissing them off royally by behaving so pathetically (though a few made their distance). Actually, I get that many were being lovely friends by allowing me to bang on about it and being sympathetic but it just perpetuated and exacerbated the problem. Finally, one friend gave it to me straight and told me that I wasn't behaving like myself (i.e. I was being utterly pathetic), to STFU and never talk about this person ever again. EVER. Yes it was a verbal slap in the face, but it was by far the best thing someone could have done for me in that situation.
Take control of your life and delete and block now. On that 'limerence' thread there were many stories of people losing friends, jobs, marriages, health… that all sounds very dramatic and not like you're situation I'm sure… but actually many, many people started down that path in just the place you are right now. As someone else said - new year, new start.