How can I move on from this?

About 3 weeks ago me and my boyfriend of 1 year got into a huge argument over during which he broke up with me in a

brutal way. He didn‘t even hear me out and just left. I was in such a shock state that I called him and literally begged for him to be with me. He apologised a few times since then for how he acted and deeply regrets it, we also talked about the whole thing. But ever since that day I‘m not as happy as I used to be, I feel very hurt. When we‘re together now we have the best time and everything feels perfect but whenever I‘m alone I feel my heart aching. I really want to move on from this but how?