Moving forward

My partner ended our relationship with me after just over 2 years. He had very selfish reasons. I have a son & due to that, time we had together was very limited. His words were, I’ve tried this & it doesn’t work for me all this. He said he hadn’t fallen out of love with me, he didn’t blame me, it was all on him & he felt nothing negative towards me. Roll on 7 weeks he is in a relationship with somene he has known for years who has 4 children. I am genuinely heartbroken for a 2nd time by him. I can’t make sense of it all. I’ve been worrying over him for the last 7 weeks as we have had no contact & he’s been with someone else. And it’s not like we are Kids he is 47. I feel like I’m stuck in a never ending grief cycle. I just want to move on