my ex resents me and my friend why exactly?

Long drama story made very short:

Dated this guy J from August 2009-Feb, 2010.In the 2009 semester my life well fell apart with school,health and I found out that I was pregnant 6 weeks along the way, had an ultra sound and a couple of days later had a miscarriage(that was towards the end of the semester).I did not tell J because he was dealing with the loss of his uncle who just passed away and stress from Grad School.I turned to 2 or 3 good friends to help me,my teachers were about to kick me out of class due to being so sick and missing class and so forth.It was one of the worst times ever. FF to the break up..In Feb. 2009 I finally thought I had it after so much drama,I was trying to get over the miscarriage and it was hard especially after telling my parents and sister in December/January.My grades well they plummeted in the 2009 fall semester as in 3F's on finals and one B due to the state of depression after the miscarriage. I turned to a good friend telling her abt. J and I and how I could not take it.She told me that J was supposed to return a book he borrowed and she would talk with him.When I got back to my dorm I was texting her and changed my mind abt J when the cell goes off and J calls.he found out what I told my friend and well he breaks up with me.1 week later I asked my friend if she could get a hold of J because I had some stuff to give him and because he did not want any contact with me after the break up. I gave him this 20 page letter explaining most of the stuff minus the depression,pregnancy and miscarriage and returned a charm bracelet he once gave me and I never wore.

After that I picked up my life,we both moved on, life went back to normal,I met new friends,hung out at the bar where he hangs out at and he would always close his tab and leave which made no sense.I asked him for coffee,he proposed to me drunk,he played with people's emotions,finally told me he never liked me and so forth.I finally let go of the past and have a healthy relationship with my life and those around me.

I finally told J about the miscarriage and so forth and yet he seemed so cold and cool about it as though it did not bother him.He asked 6 questions,told me he did not want drama or stress added to his life and then we let each other go.That was a couple of weeks ago. Our mutual friend H who is Muslim let him borrow her Quran and he never returned it so she texted him and he kept on saying when he has time.She finally sent him a message on fb and he answered saying that he would be at place so and so doing his hmwk and he willl let her know at what time to meet.He still resents my friend for making us talk after the break up and apologize!That was in Feb. and over 3 months ago!

I do not understand why he cannot let go of the past and just move on the way I have..I focus on school and so forth..I know he is dealing with his father losing his job,having lung cancer which has spread and other financial issuues...I told him that I can be his friend yet he turned that down...

What is his problem?I am giving him space.I am graduating and looking for a job 1 hr away from the university where I attend and where he is doing his MA at...Why does he hate me?I know that he loved me for like 2 years and he wanted to marry me,he was even planning on settling down and moving in together in the fall and saving up for a house...Then the break up happened and then he turned into this jerk...