Can I get him back?

So my man and I were engaged and 2 weeks ago I flipped out on him and we broke up because I thought he was cheating. It turns out I over reacted and now want to get back together. We have an apartment together and after the break up he moved out and was gone for only 3 days. After that 3 days I reached out to him to get the rest of his stuff but asked him to come in and talk. He reluctantly agreed and after an hour conversation which was actually more like him telling me off we agreed to be cordial. So the next night I invited him over again with the lame excuse of visiting our dogs. He came and we ended up having a nicer conversation and he wanted to spend the night. I convinced him that night to move back in since we are unable to get out of our lease early. So we agreed to be roommates for 2 months until the lease is up. The first night back he moved in he said it was probably better he sleep on the couch. I agreed but then asled him to come to bed because I felt bad that the couch is pretty small and uncomfortable and honestly I didn't want to sleep in our King sized bed alone again. So he came to bed and we ended up making love. Which we hadn't done in a while. But this isn't our only intimate encounter but this time was different because it was really loving and passionate. We were both confused as to why we have such an intimate and passionate experience AFTER the break up. So fast forward to now we've been kind of getting along but he's still very bitter about how I treated him which to me makes sense. I was controlling and mean and I wrote him the best apology letter anyone could imagine. He received it very well and said it made him smile. He told me he loves me and would take a bullet for me and wants his best friend back. I told him I feel the same but I want to get back together. He said he understands what I'm saying but he doesn't want a relationship. Not just with me but in general he feels like he needs to be by himself. I told him I understand but wanted him to think about it and keep an open mind. He is adamant about not wanting a relationship. Is there any way I could change his mind? I love him and really don't want to lose him. I know him and I really believe he's so adamant because he's still hurt about how I've been to him. We've been together going on 4 years. Is there any way to get my relationship back?

The roomate thing goes pretty good when he doesnt get reminded of something and sort of lash out. We get along for the most part but he's bitter :/ understandably. It's hard since we aren't together and I want to be. But I feel like it's for the best because I get glimpses that he still cares which makes getting together again seem less impossible. It's been going pretty much the same way it did when we were together except we dnt say I love you and only hug goodbye instead of kiss and things like that.