Post break up - Need support :(

My boyfriend of 6 years broke up with me 2 months ago. I was heartbroken but he said he wanted to remain friends. We used to hang out a fair amount, go to theme parks together have days out and go shopping together. About a month after we broke up I thought I may have been pregnant. I went to the doctor who confirmed I had been but no longer was :( I told my ex and he said he would support me. Despite this he was never open to talking about it so we contiuned hanging out but not mentioning it. Last week I was really down about it and askednto speak to him. We ended up having a massivr argument. :( he messaged me later that night and said we could sort out the argument and agreed a day to talk. The day before we were meant to meet up to talk he messaged me asking for some stuff back (he used to live with me) and I said okay but we could have just spoke about it the next day as we were meeting up anyway. We had a small disagreement that ended with him sayijg lets agree to disagree. Then next day I rang him to sort out meeting up. He said he didnt want to talk that day and we would talk soon. Then half way through the convo he said he had had enough and put the phone down. I text him saying I would bring his atuff round and he text back saying that we could no longer be friends. I asked him to reconsider but he said no he has had enough of me and was done. I dropped his stuff odff when I knew nobody would be in and he got his mum to drop off a check she had written for the money he owed me. He then text me saying he hated me. Im distraught. I text him back saying I understand hes upset now but hopefully in the future we can work on a friendship. He didnt reply and that was two days ago :( I havnt got in contact with him since and am trying not too at all. He lives with his mum who doesnt like me so I guess its difficult anyway but also we work together so I have yo see him a couple of days a week anyway :( Im over the relationship I just dont want to loose mt best friend. 6 years is a long time and we wrre together since we were 17 so have grown up together really. What can I do? Im so sad and confused. Does he mean what he says? Will he ever contact me? :(