Help: how to cut emotional ties?

Dear all,

I just came out of a relationship with a person who I believe is a narcissist.
I am not an expert but, while searching for self-help sources online, I found this webpage and I was astonished to see that my ex boyfriend's behaviour perfectly matched the characteristics you described.
I was put on a pedestal in the beginning and that made me feel suspicious. I noticed also that he had a big ego and that he was often talking behind people's back. I stayed with the relationship for about 8 months and, since he was consistent,"loving" and careful, I thought I could trust him. However, all of a sudden, he started treating me badly: he criticized everything I did and often with unkind manners. He was moody and would get angry for very very small problems. He would make mean comments about my clothes and aspect but I was always the same person that months earlier he said he found so incredibly attractive! I told him I would not accept that type of attitude and asked him if his feelings had changed. I said that if he kept acting like that, it would better for us to break up. He told me that he would do all he could for the relationship to function, that he loved me, etc. He went back to his nice behaviour for three weeks. I thought it was just a phase. Then he went on a trip with a professor of his and 3 friends. I don't know if something happened there but when he came back he was distant and nasty. I asked him what was happening and he acted with indifference and rage. It was awful, the worst thing I have experienced in my life. And a couple of days later, he dumped me, without a reason! He showed zero empathy.

I must say that the sources I found online helped me see that I was not the problem because at the beginning I suffered a lot because I couldn't understand the situation and his behaviour. I analysed my attitude looking for "mistakes" but I couldn't find any. I had always been sincere, open and gentle. I felt really lonely because most of my friends didn't help me in getting out of this problem. He is very good at acting as the friendly guy but in reality he uses people when he needs them and then throws them away. He never lets people come too close to him so they don't realize how he really is. He put on an act with me as well. I feel I was manipulated. However, his true nature came out from time to time. He used to flatter powerful and popular people in order to get favours from them and to criticise harshly and without a real reason those whom he considered stupid (they are NOT) and those who wouldn't get hooked by his charming techniques. He had a sense of entitlement as if he was a genius whereas he is only an average artist. He also had unrealistic fantasies about his success in the future!

I am aware and fully convinced that I am lucky not to be with him anymore and I feel really uncomfortable when I see him. I met him a couple of times in the university where we both study and I immediately felt a bad energy. I have never called him nor written to him since we broke up. I blocked his Facebook contact. However I still feel low from time to time... I also saw him with another girl and I know they are going out. I thought I would feel worse but i only felt a little sad. Then I realized that he was incredibly superficial: in less than two months he went from telling me I was the woman of his life to going out with another girl! I know he simply can't be trusted and means no good for me nor for anyone else. People are interchangeable for him. BUt I would like to know why this situation doesn't make me angry, why it does cause me depression. I despise him, i really do but from time to time I still feel hurt.
I hope you can give me some advice on how to cope with this unpleasant feeling and cut the emotional ties I still have with this person and with what happened.

Thank you in advance for your precious time and help.
Hugs!